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
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
相关考题：
当你执行以下查询语句:SELECT employeesno,ename FROM employees WHERE employeesno=7782 OR employeesno=7876;在WHERE语句中,以下哪个操作符可以取代OR?() A.INB.BETWEEN……andC.LIKED.=
下列哪个语句查出雇员表(employees)里的雇员名字(ename)是‘SMITH’的信息,并且给雇员名字(ename)列定义一个别名Name()。 A.select employeesno，ename Name，job from employees where ename=‘SMITH’B.select employeesno，ename ‘Name’，job from employees where ename=SMITHC.select employeesno，ename “Name”，job from employees where ename=‘SMITH’D.select employeesno，ename ‘Name’，job frome mployees wheree name=‘SMITH’
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对于以下SQL语句说法正确的是()SELECT ename FROM empWHERE 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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当你执行以下查询语句：SELECT employeesno，ename FROM employees WHERE employeesno=7782 OR employeesno=7876；在WHERE语句中，以下哪个操作符可以取代OR？（）A、INB、BETWEEN……andC、LIKED、=
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在Transact-SQL语法中，以下SELECT语句正确的是（）。A、SELECT * FROM studentB、SELECT * FROM student WHERE GETDATE（）C、SELECT * FROM student ORDER st_idD、SELECT * FROM student BY St_name
pl/sql中有4条与游标有关的语句，他们在程序中出现的正确顺序是（） 1 open abc 2 cursor abc is select ename from emp 3 fetch abc into vname 4 close abc A、1234B、2134C、2314D、1324
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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
单选题当你执行以下查询语句：SELECT employeesno，ename FROM employees WHERE employeesno=7782 OR employeesno=7876；在WHERE语句中，以下哪个操作符可以取代OR？（）AINBBETWEEN……andCLIKED=