哪一子句可实现 SELECT 语句查询员工平均工资小于5000的部门信息 ? ( )
GROUP BY dept_id WHERE AVG(sal) < 5000
GROUP BY AVG(sal) HAVING AVG(sal) < 5000
GROUP BY dept_id HAVING AVG(sal) < 5000
GROUP BY AVG(sal) < 5000
青云测评
青云测评
哪一子句可实现 SELECT 语句查询员工平均工资小于5000的部门信息 ? ( )
GROUP BY dept_id WHERE AVG(sal) < 5000
GROUP BY AVG(sal) HAVING AVG(sal) < 5000
GROUP BY dept_id HAVING AVG(sal) < 5000
GROUP BY AVG(sal) < 5000
