Q135 Which two are true about a SQL statement using SET operators such as UNION?
Q135 Which two are true about a SQL statement using SET operators such as UNION? (Choose two.)
- (A). The data type group of each column returned by the second query must match the data type of the corresponding column returned by the first query.
- (B). The number, but not names, of columns must be identical for all SELECT statements in the query.
- (C). The data type of each column returned by the second query must exactly match the data type of the corresponding column returned by the first query.
- (D). The names and number of columns must be identical for all SELECT statements in the query.
- (E). The data type of each column returned by the second query must be implicitly convertible to the data type of the corresponding column returned by the first query.
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