Unless the ALL option is used, duplicate rows are eliminated from the final result.
If the ALL option is specified, duplicate rows are retained. The ALL option can be specified for as many MINUS operators as are used in a multistatement query.
Unless the ALL option is used, duplicate rows are eliminated from the final result.
If the ALL option is specified, duplicate rows are retained. The ALL option can be specified for as many MINUS operators as are used in a multistatement query.