Set Operators
Set operators combine the results of two component queries into a single result. Queries containing set operators are called compound queries. Table 4-5 lists SQL set operators. They are fully described, including examples and restrictions on these operators, in The UNION [ALL], INTERSECT, MINUS Operators.
Table 4-5 Set Operators
Operator | Returns |
---|---|
|
All distinct rows selected by either query |
|
All rows selected by either query, including all duplicates |
|
All distinct rows selected by both queries |
|
All distinct rows selected by the first query but not the second |