单选题对于以下SQL语句说法正确的是（） SELECT ename FROM emp WHERE sal IN (SELECT MAX(sal) FROM emp GROUP BY deptno);A这个语句是符合语法的B这个语句是不能执行的,因为缺少HAVING子句C这个语句是不能执行的,因为分组的条件列不在SELECT列表中D这个语句是不能执行的,因为GROUP BY子句应该在主查询中,而不是在子查询中E在主查询的WHERE条件中,不应该用IN,而应该用等号
单选题
对于以下SQL语句说法正确的是（） SELECT ename FROM emp WHERE sal IN (SELECT MAX(sal) FROM emp GROUP BY deptno);
A
这个语句是符合语法的
B
这个语句是不能执行的,因为缺少HAVING子句
C
这个语句是不能执行的,因为分组的条件列不在SELECT列表中
D
这个语句是不能执行的,因为GROUP BY子句应该在主查询中,而不是在子查询中
E
在主查询的WHERE条件中,不应该用IN,而应该用等号
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