统计每个部门中人数( )
2024-01-09 21次 计算机二级 反馈错误 加入收藏 正确率 : 100%
题目内容:
[单选题]统计每个部门中人数( )
A.SELECT SUM(ID) FROM EMP GROUP BY DEPTNO;
B.SELECT SUM(ID) FROM EMP ORDER BY DEPTNO;
C.SELECT COUNT(ID) FROM EMP ORDER BY DEPTNO;
D.SELECT COUNT(ID) FROM EMP GROUP BY DEPTNO;
本题链接: