Sql where combination of two fields. Determining count of unique combination of two fields in .
Sql where combination of two fields. name is also type ENUM with 2 options.
Sql where combination of two fields Selecting count by row combinations. How do I SELECT data from multiple columns in SQL? To select data from multiple columns, specify them in the SELECT clause, e. Two notes: a multi-field primary key is a combination of other primary keys from other tables and the record contents describe content relavant to the specific key values. Add a comment | 0 Constraint for restricting NULL values in combination of columns. Part_Table t where t. LastName LIKE 'n%' if you don't want to use that, wrap your query in a subquery so you can use the ALIAS,. Follow answered Apr 24, 2013 at 11:11. To get unique combination on the basis of 2 Columns. Although I periodically have the bandwidth to be obsessed with StackOverflow, I don't know if I can make the ongoing commitment, for a full year. Selecting rows where some columns are same but others are different. How would I do this? I'd prefer to do this in SQL rather than PL/SQL. ALTER TABLE Employees ADD FullName AS (FirstName + ' ' + LastName) Although in practice I'd advise that you do that operation in your SELECT. Ask Question Asked 11 years, 9 months ago. period, p. SQL> select count(*) from ( 2 select distinct deptno, job from emp 3 ) 4 / COUNT(*) ----- 9 SQL> My specific problem required me to divide a SUM by the COUNT of the distinct combination of various foreign keys and a date field, grouping by If you want all all column_1 which don't have one of a list you can do it in the general case like this. wildplasser wildplasser. What I expect my query to be is, it must exclude the data only if this combination i. Selecting distinct 2 columns combination in mysql. group_id, SUM(isPresent * pd. The definition of table D would look I have a table with two columns representing a PK. source = t2. I want some suggestions. Stack Overflow. Say I have a dataframe df with two or more columns, is there an easy way to use unique() or other R function to create a subset of unique combinations of two or more columns?. MySQL query to unique combination of columns. If I use query like this (clause on one field): SELECT DISTINCT fldID FROM T1 WHERE fldID NOT IN ( SELECT T1. SQL Query to return count of records for unique combination of two columns. Match two Columns in SQL Join. destination > t2. MySQL: Select from table A which does not exist in table B. 2. Basically in this example it should select row 1 and 2, because their combination of variant_id and From OP question, OP wants to group columns and get additional columns that aren't grouping columns. SELECT p. 953. mySQL and PostgreSQL support it, SQL Server does not (click on those links for details). SQL-Statement: SELECT T1. 997', '2021-01-19 02:05:28. I have table that has two columns and I need to concatenate these two and update first column with result. You should be able to do this with something like ALTER TABLE. However, I need to perform the search on a combined value of two columns - first_name and last_name: WHERE customers. How to select all records where ANY two columns are above a certain value. Excuse my poor english, and sorry if I'm wrong. Now I want to find the rows with a unique combination of ID and A. See: Create unique constraint with null columns I have a query: SELECT s. In SQL it would look this way: select unique cat, sub from ta SQL query where combination of two columns is unique (with sub-query) 1. B) NOT IN (SELECT I want to find all records where the combination of the two columns is not in the mapping table. Col, b. You didn't specify what RDBMS you are using. you just had to create a Table Constraint with Type Unique then selected the checkbox's of each columns. SQL check for unique column combination entry. So, the simple way would be to use CASE statements to convert the values you don't want counted to NULL. Provide details and share your research! But avoid . * FROM T1 WHERE CONCAT(T1. Concatenating two columns where one contains nulls. create table table_name ( col1 type, col2 type, primary key(col1, col2)); The benefit is : Now, I want to know how many times each combination of values for columns A and B appear, regardless of the other columns. Using (IN operator) OR condition in Where clause as AND condition. years FROM periods p I know that the simplest way would be use join, but the problem is - that in the application I can add only a clause after WHERE. For example the first two rows in the table is "the same" since the combination of 2 and 3 is the same as 3 and 2. ingredient from ingredients i1 join ingredients i2 on i1. branch, r. period, s. Get unique rows with combination of two columns. However, if all the columns are non-nullable, your query should work well. 0. Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. currentdoctype=PUSH and CurrentDocEntry=15 are occurring in the same row, then exclude that row. The expected result to my quesion would be: T-SQL "Where not in" using two columns. E. in Row 1: combination of 1/2 is duplicate so its removed and the code snippets under the -- debug lines, copy the script until just these code snippets and paste this part into an SQL prompt to test the intermediate results. So, in this example, I want an output something like this: sql query to count two columns with same values. Viewed 4k times 4 . I have a table with 14 columns which can be referred to as column_1 - column_14. The principle is get a row identifier to "remember In Oracle, I have a table called "MyTable". Code1 = p. The SQL Server documentation reflects the fact that the product only supports CHECK constraints at two physical levels, referred to as 'column' and 'table' but logically are column-level and row-level respectively. Finding unique combinations and their numbers using SQL. 1. Using SQL then the following query should work. i want if Combination of (ATM,Device) from ATM Table matches with (ATM,Device) of CashStatus table then display row Of CashStatus table – Shaggy. Example: Column A | Column B Dog Cat Cat Dog Horse Cat Dog Cat A unique combination above should return 3 rows. 58. I need only unique combinations where sequence doesn't matter. I'd like to avoid using a subquery, if possible. The city that sorts alphabetically first is reported as city1. The general rule would be: IF there are two or more lines where the controlname AND brandname AND grouptypes columns are equal Removing duplicate values from sql server on condition of 2 columns. How to select a column where other columns have specific values. How to check for combination of column values in sql server table. Viewed 2k times 1 . Using SQL, I have 5 columns: ssn, lastname, firstname, RF and a flag field. The rows have a varchar Conversation ID, varchar sender, and varchar recipient. Ask Question Asked 5 years, 11 months ago. 997', '2021-01-19 01:07:28. GetLeastDate('2021-01-19 01:09:28. – A join in SQL Server is not automatically implemented as a nested loop. Hot Network Questions Conditionally hiding parts of a tizkpicture in beamer I am willing to bet that this is a really simple answer as I am a noob to SQL. Removing duplicated row having same keys in different column. Unfortunately my meager SQL skills aren't up to the task. Quick preface: this answer was based on the originally incorrect tag that this question was relating to SQL Server. SQL selecting values between two columns with a list. SELECT DISTINCT COMPONENT_ID, PACKAGE_ID FROM BILL; you're calculating COUNT(COMPONENT_ID) * COUNT(PACKAGE_ID) because the DISTINCT operator will generate every possible combination of COMPONENT_ID and I am not very experienced with sql queries and looking for an efficient way to perform the same WHERE IN condition on multiple columns. – David Balažic. Hot Network Questions Merge two (saved) Apple II BASIC programs in memory So t1. So with PostgreSQL, it looks like, MYSQL: Values of a column where two other columns have same value. id1 = ac1. roles FROM (SELECT branch FROM yourtable) b CROSS JOIN (SELECT roles FROM yourtable) r WHERE NOT EXISTS (SELECT 1 FROM yourtable WHERE branch I don't know what a db/sql fiddle is. The key should point to columns that are in a unique or primary key and you do have the required primary keys in tables B and C. I have a SQL Update from One Table to Another Based on a ID Match. How do I use SQL/mySQL to select rows where 2 columns have multiple of the same value and 1 column has a distinct value? Hot Network Questions Fixed Repeating Output Given two Tables that are Linked together tbl_Gasoline -------------- ID | Type ------------- 1 | Diesel 2 | Kerosene and tbl_Expense ----------------------------- ID The correct syntax for SQL Server should be the next: ALTER TABLE TableName ADD CONSTRAINT ConstraintName UNIQUE (id, link, name) Unique combination of two columns in mysql or postgres. Only the combination of 2 columns (in each of the tables) creates a unique identifier that enables me to make an inner join. Hot Network Questions I have a simple database with two tables : Catalog (id_catalog, name )Product (id_product, name, quantity, id_catalog# )None of those fields can be empty, so I put a NOT NULL constraint everywhere. MySQL multiple columns in IN clause. Alternatively, you could choose to forego the primary key column (if all you're Combined 2 columns into one column SQL. Select combinations of two columns in a where clause. SQL: Use this function to get least date between maximum of four dates, if you want to find the minimum for two columns just pass null for date3 and date4. In that case every column included in primary key will be called: Composite Key. table_name ADD CONSTRAINT uq_table_name UNIQUE(KEY_1, KEY_2); This way I can make the combination between KEY_1 AND KEY_2 unique but I want the vice versa as well. Modified 7 years, 2 months ago. Prods and Prod_Colour. How do I do that? edit: someone suggested making a join using AND. There can be multiple values of either value, so long as there are not two that share both. 17. retrieve multiple columns from multiple tables not exists or match on rows set (mysql php) 0. I need to be able to pull unique docs where combination of fields "cat" and "sub" are unique. The NOT IN query can check against only a single field, it cannot check against multiple fields at the same time. SQL to select unique combination of two columns having interchangeable values. SELECT DISTINCT ON (1, 2) LEAST (city1, city2) AS city1 , GREATEST(city1, city2) AS city2 , dist FROM tbl ORDER BY 1, 2, dist; -- optional sort & tiebreaker fiddle. Combination of FirstName and LastName must be unique and can add multiple addresses for a single contact. a,b might also be returned asb,a: SELECT DISTINCT CASE WHEN col1 > col2 THEN col2 ELSE col1 end, -- similar to LEAST CASE WHEN col1 < col2 Yes, this is a normal thing to do in SQL and it works (having a composite primary key, in which multiple fields together constitute a unique value). Count unique combination of multiple fields in a table with group by, returning I want to check for the is not null constraint for multiple columns in a single SQL statement in the WHERE clause, is there a way to do so? Also I don't want want to enforce the NOT NULL type constraint on the column definition. 42. Unfortunately there is no single column to join them. Difference in two SQL query, but same result. How to I ended up figuring out something that others may find useful. Its the combination of both the ContactId and the Get Count() for DISTINCT values for each field SQL Server. How to query counts of unique row combinations in MS SQL? 1. id2 group by In my sample MySql table, I have a table Table1 and three columns id, column1 and column2. fldPtr ) It returns correct result. *, (case when manual_presence = 1 or manual_precence is null and barcode_presence = 1 then 1 else 0 end) as IsPresent end from presence_list pl ) pl join I'm trying to run a query where two columns are not the same, but it's not returning any results: SELECT * FROM `my_table` WHERE `column_a` != `column_b`; column_a AND column_b are of integer type and can contain nulls. The sql could look like this. I have an index with 20 different fields. FirstName + ' ' + CC. Assume I have the following style table, col1 col2 and col3 have same value scopes, I want to select the records when two of the 3 columns have a value combination such as ('ab' and 'bc'), in the following example, the first 3 records should be selected. I didn't know how to link them up in a unique way using SQLiteStudio, turns out, it has nothing to do with editing columns to unique etc. Ask Question Asked 5 years, 10 months ago. Col as ColB into #c -- Generates destination temp table #c from #a as a cross join #b as b -- Cross join is the preferred syntax order by a. Of course, the syntax is not supported by all SQL products e. But I need that two products couldn't have the same name if they are in the same catalog. Modified 11 years, 3 months ago. I tried concatenating sub_id and disc, then using row_number() over (partition by key order by key) and I get the same answer. Ask Question Asked 9 years ago. 3. Ask Question Asked 13 years, 10 months ago. SQL Count unique rows where a column contains two different values. year, s. type is type ENUM with about 10 different options, and t2. Then use left outer join and aggregation to get the counts for all combinations:. Here is the syntax for multiple tables: For one table and one composed condition, like in the SQL sample in your question: For closures and closure like things where you need to compare two different columns, you can use joins. WHERE ( fldID, flrValue ) NOT IN . A user can choose a list of option combinations and then search for them. Given: table1 has column 1 (criteria 1) column 2 (criteria 2) column 3 (metric 1) table2 has column 1 (criteria 1) column 2 (criteria 2) column 3 The other field should be unique. . select ac. So far, I'm doing this, SQL How to check if 2 columns from one table matches a conditional within second table. Hot Network Questions The following uses MS SQL Server syntax: SELECT true WHERE ROW(1,2) IN ( ROW(1,2) ); PostgreSQL doesn't require ROW() (it's implicit). SQL WHERE. I also have a SQL Server which runs in the cloud. SQL count based on two columns. It goes 1,2,3,2,3,1,3. This isn't doing what I need. Multiple columns for the same WHERE IN set. By this I mean that I only want to see the rows where the combination of A(1) and A(2) exists only once. Unique value combination in MySQL. Commented Mar 22, 2012 at 14:33. destination AND t1. destination = t2. Asking for help, clarification, or responding to other answers. SQL Count number of occurrences for each distinct combination. Coalesce and Concat in the same statement, Postgres. If you don't care if an existing combination is returned in the right order, e. shares) as PresentShares, SUM((1 - isPresent)*pd. Viewed 12k times 1 . At least one of these numeric fields must be filled. Individual_ID) While To use multiple WHERE conditions in an SQL Server SELECT query, you can combine conditions using logical operators such as AND, OR, and NOT. sql - Selecting row that compares against values in other rows. I want to find every unique combination of 'A' and 'B'. But the SQL Server do not support syntax . FROM table2. id1, ac. I cannot have any instances in this table where there are multiple rows containing the same information in column_1 and 2. how to increase a search variable by 1 This query returns all unique pairs of values from the two specified columns. Right now I have the below query in a loop. This table has columns 'A' and 'B'. Determining count of unique combination of two fields in I have a table in SQL Server with two numeric columns. select acct_num Select combination of fields not in other table sql server. ALTER TABLE dbo. Select distinct combinations from two columns. V = I am trying to join two tables. id1 and ac. Multiple 'in' statements in a postgres sql select combination of two columns. Hope this helps So t1. And the requirement is to remove duplicate based on two columns:from above example let y,z then you may use below instead of We can state 2 or more columns combined as a primary key. It occurred to me to try ftable coerced to a dataframe and use the field There are certainly other correct answers here but I'll add the best elements of them together to answer the question completely: select a. Delete duplicate based on one column based on another column's value. Code3 ) then 1 else 0 end as More elegant syntax for DELETE WHERE on list of two columns pair. SELECT DISTINCT b. I need to get all records from a table which meet the value pairs (so the column values must match simultaneously). You can also use filters or aggregate functions as needed. Selects all records where the value of the new field of T1 is not equal to the value of the new field of T2. id2 = ac2. shares) as NotPresentShares from (select pl. IN clause multiple columns. better use the complete concatenation is the WHERE clause. e. searchstring would be like the data they searched for. select top (1) p. SQL delete row SQL Query - COUNT for combination of two or more column from single table. ISNULL(a,b) can be used if there are two columns, but COALESCE is more general. Viewed 10k times 1 I've found this question on the Stackoverflow site but it only answers MySQL server. -- first make the list with items_2_find as ( SELECT 'ABC' as V UNION ALL SELECT 'XYZ' as V UNION ALL SELECT 'QWE' as V ) -- left join and find missing SELECT items_2_find. Modified 12 years, 2 months ago. SQL: Count distinct column combinations with multiple conditions. Expected Output: In a large data set if you are selecting the multiple columns in the select clause ex: select x,y,z from table1. And the Composite primary key consists of Just to clarify, QuestionID and MemberID are not separate primary keys but rather the combination of them form a unique pair/tuple What is it about your existing query that you don't like? If you are concerned that DISTINCT across two columns does not return just the unique permutations why not try it?. Selecting distinct combinations. I have a mysql table that looks like this: 1 value1 value2 3534 2 value1 value1 8456 3 value1 value2 3566 4 value1 value3 7345 5 value2 value3 6734 sql; database; distinct; distinct-values; or CREATE UNIQUE INDEX idx_twocols ON t1t2(t1_id, t2_id) You will probably need to add NOT NULL to the declarations for each of the two columns. V = I recently saw someone post this as part of an answer to an SO query question: SELECT DISTINCT a, b, c FROM t1 WHERE (a,b,c) NOT IN ( SELECT DISTINCT a,b,c FROM t2 ) I'm a bit confused, as I I want to return the unique combinations in in session, and the count for this combination. SQL Server - count on unique combination from two columns. Here is an example of the Table Data has two columns: Source Dest 1 2 1 2 2 1 3 1 I trying to come up with a MS Access 2003 SQL query that will return: 1 2 3 1 But all to no avail. For example assume this is my table: I have this table, and i would like a SELECT to exclude the lines marked. create sql select query filter with two value on same field with and condition. – If I understand correctly, I think producing two columns is the way to go: select pd. – Unique constraint on two columns for any combination in SQL Server? Hot Network Questions Tryin to find a short story name, man speaks to parallel lives on an app (spoilers) How do I remove the amplitude scale bar in spectrogram made with ggspectro? In what ways is China an adversary to the West? UPDATE table_name SET column_name = CASE when col_1 = 2 and col_2 = 1991111 then 2 when col_1 = 3 and col_2 = 1991110 then 3 . g. destination ); When multiple rows per source/combination exist you must either add DISTINCT or a GROUP BY. column1 = 'value' and t. How can I define a composite primary key consisting of two fields in SQL? I want to make a table name voting with fields QuestionID, MemberID, and vote. So, this would be allowed (Not including the id) 1 1 1 2 2 1 2 2 but not this: If it was either of those two, it would not be unique, but the combination of the two is guaranteed unique. Now, for other_field you can use some unique id column, or any combination of fields (except for {pole, postion} of course) Share. If you need the data, why not select in when you need it? The SQL for selecting what would be in that field would be: SELECT CONCAT(zipcode, ' - ', city, ', ', state) FROM Table; This way, if the data in the fields changes, you don't have to update your combined field. I want to select unique from table where sender_id = 2 or recipient_id = 2 and I need this result: sender_id recipient_id 2 1 2 3 How to do it? Why? Because I wish to build a facebook-like inbox in which sent and received messages are aggregated, and this query is the bottleneck so far. ingredient, i2. 997', '2021-01-19 00:02:28. For example, a hash join can be used to implement the NOT IN. amount FROM salaries s I would like to select from salaries table only the rows that have period and year equal to:. SQL query to compare multiple Selecting distinct 2 columns combination in mysql. It certainly works as you might expect in Oracle. Individual_ID = table2. fldID FROM T2 JOIN T1 ON T2. I need to go through this table and where the 4 columns are equal to another row and the value of the flag field in that row is equal to 2050, then delete that 2050 record. SQL> select distinct deptno, job from emp 2 order by deptno, job 3 / DEPTNO JOB ----- ----- 10 CLERK 10 MANAGER 10 PRESIDENT 20 SQLite Unique Key with a combination of two columns. I need a table that is unique on a combination of two fields (i. Code2 and t. Hot Network Questions Maximum possible speed of Mechas? Assigning Priority in Cyclic Isomers GatherBy Question What is type of probability is involved when mathematicians say, eg, "The Collatz conjecture So I decided not to tell the database that I was interested in multiple columns but fool it into thinking I was requesting only 1 column (sort of, the database won't really be fooled), by concatenating the columns I needed. I have following Table Structure : Tried but doesnt work. About; count on unique combination from two columns. name is also type ENUM with 2 options. com. *EDIT: The 2 values are an example, in reality I need to maintain well over 10,000 combinations of ID-Sub_ID. Note: Point 1 query return if all columns have some value if anyone is null or empty then it will return null for all, means Name will return "NULL" value. mysql unique combination of two columns. column2 = 'value'; Here I will get a number of rows with a combination Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The following two rows for (saleprice, saledate) would qualify as "distinct" (though looking identical to the human eye): (123, NULL) (123, NULL) Also passes in a unique index and almost anywhere else, since NULL values do not compare equal according to the SQL standard. If you want to see all of the other information that is different, it sort of defeats the purpose of aggregates IMO. Follow SQL - Counting the number of rows that contain two distinct fields Need to query distinct combination of two fields, along with a count that distinct combination occurs. ingredient; For four ingredients, this will return 6 rows, of all possible pairs but with each pair appearing only once. A,'Seperator', T1. My table has three columns which are relevant: entity_id, station_id, and obs_year. 997') as theDate --SELECT You can try with something like this: with test(ID1, ID2, SomeNotImportantComun) as ( select 1 ,2, 'A' from dual union all select 2 ,1, 'A' from dual union all select 3 ,4, 'C' from dual ) select id1, id2, SomeNotImportantComun from ( select id1, id2, SomeNotImportantComun, row_number() over ( partition by least(id1, id2), greatest(id1, id2) order by id1 desc, id2 desc) SQL Server - count on unique combination from two columns. ingredient < i2. After that you can do your composed foreign key. selecting a distinct combination of 2 columns in SQL. SQL - concatenate values in EDIT: Company, webdomain combination may not be unique. Add a comment | 3 Answers Sorted by: Reset to default 7 . I wrote this simple query which cannot be run by EF Core: As you can see combination of 2 columns should be unique in a row. I. When i run a select after a number of joins on my table I have an output of 2 columns and I want to select a distinct combination of col1 and col2 for the rowset selecting a distinct combination of 2 columns in SQL. For each row the combination of station_id and obs_year should be unique, and I want to find out if there are rows which violate this by flushing them out with an SQL query. each row represents a unique combination of each value: a a a a a b a b a b b a b b c c c a however, what I want is, aab = baa = aba cca = cac = acc Finally, I want to get these values in a CSV format as a combination for each value like the image that I attached. I need to count the number of distinct items from this table but the distinct is over two columns. UPDATE Table1 SET Multiplication = CAST(Parameter1 AS VARCHAR(10)) + '_' + CAST(Parameter2 AS VARCHAR(10)) I have the below query that gets counts of distinct USERID's from the various tables and sums them to a grand total. NOT IN with 2 columns. For instance: CREATE TABLE someTable ( id int PRIMARY KEY AUTOINCREMENT, col1 int NOT NULL, col2 int NOT NULL ) So, col1 and col2 can repeat, but not at the same time. Thanks for your help! Does anyone know how to create a table with m columns from table of n rows where the values in columns of each row represent a different combination or permutation of values from the original table? For example the original table has 1 column (number_value) with 3 (n=3) rows: 1 2 3 Note: there are more than these two fields, but for the sake of simplicity I just denote these two. Is there a way to merge the two columns into one? I hope this isn't too confusing of a question. – Jirka Hanika. CM_PLAN_ID = table2. Viewed 80k times 35 . I would use EXISTS subquery with HAVING. More specifically, i'm doing the following: SELECT a, b FROM As I understand you want to check each combination of a/b and i_id/o_id. So with PostgreSQL, it looks like, SELECT whatever WHERE col1,col2 IN ((val1, val2), (val1, val2), ) I want to select data where two columns are in a set of pairs. ), and the two columns you want distinct must appear in the group by If you want all all column_1 which don't have one of a list you can do it in the general case like this. Modified 5 years, 11 months ago. The AND statement forces one column to be less than the other, thereby eliminating any repetitive 1-2, 2-1 sort of occurrences. 2k 9 9 gold Number of duplicates of a pair of columns in sql. Col -- Optional but Where completedaddress is the combination of Address1 and Address2. first_nam SELECT true WHERE ROW(1,2) IN ( ROW(1,2) ); PostgreSQL doesn't require ROW() (it's implicit). Modified 3 years, Find distinct rows based on combination of two columns. Concat values in postgresql without null values. Eg: 1, vishnu, 9961907453, 91 will return phone number as +919961907453. Ask Question Asked 7 years, 9 months ago. Unique != p. SQL - Filtering result to match TWO columns in TWO different rows. I need to check whether a combination of values in my table A exists in the specified corresponding set of columns in a different table, B. Ask Question Asked 11 years ago. Viewed 15k times 10 . Improve this answer. Code1 and t. Assuming the Param fields are ints use cast to make them strings. SQL-query to filter on two fields in combination. id FROM `Table1` t WHERE t. Eg if the values are : sender_id recipient_id created_at 1 2 10/11/2014 2 1 10/12/2014 One of the columns in both tables is category_id. V FROM items_2_find LEFT JOIN aTable ON items_2_find. TableA Prods, Date_, Prod_Colour One | null | Red One | null | Blue Two | 2012-06-08| Blue Two | null | Yellow Three| null | Green Three| 2012-06-08| Red Oracle SQL : Check for combination of values from same row from 2 columns. You can use the following query to get the above If your field Application in table Library has a foreign key that references a field in another table (named Application I would bet), then your field Application in table Library has to have a foreign key to table Application too. else 0 end But the problem is I have 380 combinations of col_1 and col_2 so if I use this approach I would be using it 380 times. ID KEY_1 KEY_2 I want the combination of KEY_1 with KEY_2 to be unique and vice versa. is a combination of two or more columns in a table that can be used to uniquely identify each row in the table. My expected results would look a little like: 1, FOO, YUM 2, BOO, BAR 3, BOO, YUM But instead, all I'm getting is: 3, BOO, YUM It appears to be filtering out all records which has 'FOO' as the type, and 'BAR' as the name. Modified 5 years, What is the right query to select the two fields combinations of the first table that are not present in the second? How to get data from table one based on ignoring data present in table 2 with combination of two This isn't an R question, it's a SQL question. Now, what I'd like to have is a query that selects all rows where a combination of the variant_id and attr_id columns occurs more than once. try to use coalesce() and concat() to combine columns in the SQL query. Deleting the unwanted records from the group_owner table. Ask Question Asked 11 years, 3 months ago. Example: KEY_1 = 111; KEY_2 = 222; I would like to do a count of the total number of distinct COMPONENT_ID and PACKAGE_ID returned from this SQL. Is I am not very experienced with sql queries and looking for an efficient way to perform the same WHERE IN condition on multiple columns. create table #t (col1 int, col2 int, col3 int) go alter table #t with check add constraint ck_only_one check ( 1 = case when col1 is null then 0 else 1 end + case when col2 is null then 0 else 1 end + case when col3 is null then 0 else 1 end ) The SQL gurus may shoot me over this, but as long as both variables are numeric you could use: proc sql; select count (distinct(person_ID + condition_ID/10)) from have; I have two class contacts and groups . I've a table A with columns COL_1 and COL_2 COL_1 contains an id for a deck of cards (52). I'm no longer aware of its validity on Oracle SQL Developer. This means that the query will not necessarily "end up in a number of tuples over 10^18" even if each of the three tables being joined contains over 10^6 rows. , SELECT column1, column2 FROM table_name. Any good way to do this? I am using Sybase. In my SQL, I am using the WHERE and LIKE clauses to perform a search. Ex: Two records with IBM, ibm. sql delete records based on combination of multiple fields in other table. To avoid the point number 1, you can use point number 2 or point number 3 - We can use IsNull or Here's a link to SQL Fiddle borrowing the example dataset from Kevin's answer so you can see the This will return the acct_num & LRN combinations with more than one distinct combination of the other fields. However, I have two category_id columns now (one from items_a and one from items_b). SQL Count number of occurences of combinations and split into separate columns by count. we can try to add columns which you want to mark duplicate in a subquery. If you need to preserve the order of columns you might use. These operators allow you to refine your To filter data by multiple conditions in a WHERE clause, use the AND operator to connect the conditions. *, case when exists ( select 0 from dbo. For example: sql:select rows where two columns value. Improve this question. SELECT * FROM Distance t1 WHERE NOT EXISTS ( SELECT * FROM Distance t2 WHERE t1. id2, count(ac. I know I can use sqldf() and write an easy "SELECT DISTINCT var1, var2, varN" query, but I am looking for an R way of doing this. So if they had '123 Center St' in Address1 and 'Apt 3B' in Address2, how would I have it select it if the searchstring was 'Center St 3B' Is this possible with SQL? An approach that scales better to more than 2 columns is to check that the number of non-null columns is 1. How to select two values from table where one of the values has to be distinct in SQL Server. I've tried using <> IS NOT, etc without any luck. Here columnn1 and column2 has combination of records like the foreign_key from two tables. Code2 = p. Suppose a table with 3 columns. SELECT * FROM AB_DS_TRANSACTIONS WHERE FK_VIOLATION IS NULL AND TRANSACTION_ID NOT IN( SELECT distinct I have table with: A B 1 2 2 1 and i trying using sql command to get only one combination A B 1 2 how can i do that? Skip to main content. Here’s what this looks like for two conditions: In our example, condition1 is dept = 'Finance' and condition2 is salary > 4000. If you specify a column name for the COUNT function, it doesn't count NULL values. Ask Question Asked 12 years, 2 months ago. I put the code in exactly as posted and the answer is not as in my question. Works for any number of duplicates. I need to check if a 2 column combination in table for UNIQUE Column ID in a table. Modified 9 years ago. Return Distinct Values Where One Column Is The Same But One Column Different. AND table1. Unfortunately this does not seem to work. so that regular group by + having might not be worked. In SQL Server you can create a foreign key using more than one column. 40. Col as ColA -- Give the columns a name for the destination , b. then simple rewrite to join is like this: SELECT a, b FROM links JOIN t primaryKey id activity template creator created 1 1 3 5 x 2011-10-13 2 2 4 2 y 2011-10-15 3 2 4 7 z 2011-10-24 (since record 3 and 4 are having same combination I want to take just the record 3 because it is the first occurance) We can use CROSS JOIN to build all possible combinations of branch and role and then NOT EXISTS to exclude those combinations that really exist in the table:. Please help! UPDATE: exactly, I'm trying to exclude 2,1 because 1,2 already included. SQL query to select rows having 2 columns equal value. SQL logic for multiple column uniqueness. More specifically, i'm doing the You'll want to use the WHERE EXISTS syntax instead. fldID = T1. I am expecting a total of 35 as the results, however I am only getting 30 as a result from this query. For Example: ALTER TABLE table_name ADD CONSTRAINT myUniqueConstraint UNIQUE(B, C, D); This might be a silly question, and my suspicion is that I can't do this, but is there a construct in SQL that would allow me to do something like the following: SELECT whatever WHERE col1,col2 IN ((val1, val2), (val1, val2), ) I want to select data where two columns are in a set of pairs. SELECT Name, COUNT(CASE WHEN Occurred_Date >= '2010-01-01' AND Occurred_Date < '2011-01-01' THEN Occurred_Date ELSE NULL END) AS [YTD] Basically what I need to do is find the number of unique combinations of 2 columns, one a Varchar and one a Double. you can't use the ALIAS on the WHERE clause because in the SQL Order of Operation, the WHERE clause is executed before the SELECT clause. Count Distinct Combinations in SQL. I have two sets of table with all the contacts on an Account their titles and etc. Now, you can create a UNIQUE Constraint by using the keyword UNIQUE with the combination of required Columns. This code utilizes CROSS JOIN so I found that it is necessary to split the two columns into two separate tables (each with one column). SELECT * FROM tbl_Bkp WHERE ? */COMBINATION OF ID,Name NOT IN (SELECT COMBINATION OF ID,NAME FROM tbl_NameCode )*/ How to compare the combination of two columns with combination of other Your SQL is valid standard SQL:1992 syntax and a good approach. select i1. Use a self join. 44. WHERE Lead_Key = @Lead_Key. I would like to cross the combined table with the categories table using category_id. I have to select records from tbl_NameCode which are not in tbl_bkp. Combine two fields in SQL for WHERE clause. What it appears to be doing is when it finds the same USERID in more than one row in any table, it is counting them only once (It is fine that Context: A table message has the columns from_user_id and to_user_id; The user should see the recent conversations with the last message displayed; A conversation consists of multiple messages, that have the same combination of user IDs (user sends messages, user receives messages) The following query will return the latest record from your table and a bit flag whether a duplicate tuple {Code1, Code2, Code3} exists in it under a different identifier:. source AND t1. I'm trying to Unique Combined Values Of Two Columns SQL. And mind you Composite keys can never be null!! Now, first let me show you how to make 2 or more columns as primary key. If you want distinct values from only two fields, plus return other fields with them, then the other fields must have some kind of aggregation on them (sum, min, max, etc. The definitions of tables A, B and C can remain as they are in the question. This works great. Example: delete all combinations except for combination 1234-2 and 4321-2. As you said group_id and user_id combination is unique we need only one entry for group_id =51 and user_id =1 ,so we can remove (51,2) You can logically have constraints at every level: (column, domain, row, table, schema, database, enterprise, global). CM_PLAN_ID. Select all rows where two columns have the same value? 1. select * from p You can do this by cross-joining all the distinct values for the two columns. Using Database developers can build SQL Select query to generate and return all possible combinations of data in SQL Server by using method shown in this SQL tutorial with cross joins and applying a simple logic. mysql; sql; Share. So the solution should be: NOTE: This isn't exactly what was asked for, I used the previous comments to solve my specific problem of inserting two values, val1, val2 from a temp table into an actual table, while this actual table had a unique key on (val1, val2). To prevent false positives, I added a EntryID Name DateModified DateDeleted ----- 1 Name1 1/2/2003 NULL 2 Name1 1/3/2005 1/5/2008 3 Name1 1/3/2006 NULL 4 Name1 NULL NULL 5 Name1 3/5/2008 NULL Clarification: I need a single value - the largest non-null date from BOTH columns. id1) as cnt from (select distinct id1 from AllCovered) ac1 cross join (select distinct id2 from AllCovered) ac2 left join AllCovered ac on ac. To do this I combine the two ID columns with a cast and delete everything that does not match this combination. (We're using MySQL 5. Unique and t. Modified 11 years ago. Commented May 7, 2024 at 10:19. Check for each condition in a separate NOT IN clause and use an AND between them. 4. --Use this function to get least date --SELECT dbo. Assume that you have 4 columns (id, name, phone_number, country_code) in a user table and you want to print phone number in this format: +countrycodephonenumber. Modified 13 Find distinct rows based on combination of two columns. So you need to Alter Function because Your create statement base on other table. WHERE CC. . COL_2 contains the combination, but without itself How can I check if a combination like 3 & 4 is not . How I can done this in entity framework code first approach? public class Contacts { [Key] public int ContactID { get; set; } [ForeignKey("Group")] public int GroupID { get; set; } [Required] public string FirstName { get; I have to get unique combinations of two columns. Code3 = p. According to the query I have written above, the data from INS2 will be fetched excluding the currentdoctype [PUSH] and all data where CurrentDocEntry is not 15. For data migration purposes I need to select All ContactsIds with their AccountID from Table A that do not exist in TableB. To make sure you don't filter out both rows when they are duplicated across columns, you need to a way to differentiate the repeats and include one of them, such as by including the pair where the first is the lesser. My question is very I have 2 tables, tbl_NameCode and tbl_Bkp both having columns ID and Name. 3,065 2 2 gold badges 27 27 silver badges 39 39 bronze badges 1 For your sample data, this query will return 3 rows, all with the value 2, which is not what the OP is asking for. Ask Question Asked 12 years, 6 months ago. Like this : Oracle SQL : Check for combination of values from same row from 2 columns. MySQL Insert/Update across 3 tables with 1m+ rows. How to get a unique combination of two columns? 0. column_1 and column_2). How to filter SQL query based on multiple values in the same column. The alternative is to use a generated (non-intelligent) primary key, [2] SQL Server - Max columns per primary key [3] How many maximum number of columns can be part of Primary Key in a table in Oracle 9i and 10g? Share. Modified 11 years, 9 months ago. SELECT * FROM ( Try with the below steps. for 2011-2012: AA, JD, 2 JD, AA, 1 PS: Ideally I'd write this for the django orm, but as I can't even seem to figure out how to formulate a sensible google search for this, to find the SQL-way is my goal. I need the results to be all distinct combinations of the Conversation ID and sender and recipient, but repeats of senders in the recipient column or There are some very good moderators, including from the SQL side of the forum. I am trying to build a SQL query where unique rows are selected based on specific criteria, but I am at a loss on how to construct it. SELECT t. hoivdddlasexavpirrfdxhemjsusgzeljikzomjglxvmltshpi