SELECT UNION Syntax
Common Syntax
SELECT ...UNION [ALL | DISTINCT]SELECT ...[UNION [ALL | DISTINCT] SELECT ...]
Example
select userid from user union select orderid from ordertbl order by userid;select userid from user union (select orderid from ordertbl group by orderid) order by userid;
Syntax Restrictions
SELECT statements in UNION do not support duplicate column names.
Parent topic: DML
- Common Syntax
- Example
- Syntax Restrictions