Use this tag only for questions about UNION, a keyword of the SQL language for combining the results of multiple SQL queries.
I'm doing some set operations in Python, and I noticed something odd.. >> set([1,2,3]) | set([2,3,4]) set([1, 2, 3, 4]) >> set().…
python set union intersectionI have a union of three tables (t1,t2,t3). Each rerun exactly the same number of records, first column …
sql mysql unionI have a stored procedure I need to call several different times passing in different paramaters each time. I would …
sql sql-server stored-procedures unionI am trying to construct a single SQL statement that returns unique, non-null values from multiple columns all located in …
sql distinct unionHow to do UNION query with PHP CodeIgniter framework's active record query format?
mysql sql codeigniter activerecord unionI've written a couple of complex queries (at least to me) with Ruby on Rail's query interface: watched_news_posts = …
ruby-on-rails activerecord union active-relationHow do you use UNION with multiple Common Table Expressions? I'm trying to put together some summary numbers but no …
sql-server union common-table-expressionWhat I have: The next structure: table_zero -> id (PRIMARY with auto increment) -> other table_1 -&…
mysql select union database-table