Which stateme nt is true about aggregate fun cti ons?
选项:
A: Aggregate fun cti ons can be n ested to any n umber of level,
B: The AVG function implicitly converts NULLS to zero
C: Aggregate functions can be used in any clause of a SELECT statement
D: The MAX and MIN fun cti ons can be used on colum ns with character data types
发布时间:2024-06-05 21:12:34