试题详情
- 单项选择题下面有关子查询,说法错误的是()。
A、子查询必须使用括号括起来,否则无法确定其开始和结束
B、在子查询中,可以使用函数
C、在子查询中,可以使用排序子句order by
D、在子查询中,还可以包含子查询,称为嵌套子查询,但是最多嵌套255层
- C
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