Use this tag only for questions about UNION, a keyword of the SQL language for combining the results of multiple SQL queries.
I have a query that UNION's two somewhat similar datasets, but they both have some columns that are not present …
sql sql-server tsql join unionI would like to combine two select queries with UNION. How can I use the result from the first SELECT …
sql postgresql union common-table-expressionI want List of party names with 1st option as 'All' from database. but i won't insert 'All' to Database, …
sql sql-server sql-order-by unionGiven a couple of simple tables like so: create table R(foo text); create table S(bar text); If I …
sql sqlite unionI have a table as below Rate Effective_Date ---- -------------- 5.6 02/02/2009 5.8 05/01/2009 5.4 06/01/2009 5.8 12/01/2009 6.0 03/15/2009 I am supposed to find the all rates that …
sql-server sql-order-by unionI'm trying to perform multiple queries on a single table using a UNION rule I have two tables: project (id, …
json postgresql unionIf I have a few UNION Statements as a contrived example: SELECT * FROM xxx WHERE z = 1 UNION SELECT * FROM xxx …
sql sql-server union sql-order-byI'm not sure if the following two relations are compatible for a union: R: <- schema name B 1 2 2 3 3 And: …
database relational-database union relational-algebraI have a table Id (PK) Owner int DescriptionText text which is joined to another table Id (FK) Participant int …
sql sql-server tsql unionI have to run a select statement across several tables. I am sure the tables return different records. I am …
sql-server performance union union-all