试题详情
- 多项选择题Which three statements about subqueries are true? （）
A、Asinglerowsubquerycanretrieveonlyonecolumnandonerow.
B、Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.
C、Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.
D、Amultiplerowsubquerycanbecomparedusingthe"；>；"；operator.
E、AsinglerowsubquerycanusetheINoperator.
F、Amultiplerowsubquerycanusethe"；="；operator.
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