12.6.44. query term ::=
- <query primary>( INTERSECT ( ALL | DISTINCT )? <query primary>)*
INTERSECT の優先順位を確立するために使用されます。
例:
SELECT * FROM tbl
SELECT * FROM tbl
SELECT * FROM tbl1 INTERSECT SELECT * FROM tbl2
SELECT * FROM tbl1 INTERSECT SELECT * FROM tbl2