Question

我试图从EMP表中显示一些数据，我想要实现的输出如下：

ENAME, SUM_SAL, AVG(SAL),MAX(SAL)

问题是我需要在每个组函数上添加一个where子句，例如：

SELECT ENAME, (SELECT SUM(COMM) FROM EMP WHERE EMPNO BETWEEN 7000 AND 7500) ,SELECT (AVG(COMM) FROM EMP WHERE EMPNO BETWEEN 7000 AND 7500), GROUP BY ENAME

这不起作用

Answer 1

要根据每个员工姓名进行聚合，请写为：

 SELECT ENAME,
        SUM(COMM),
        AVG(COMM)
 FROM EMP
 WHERE EMPNO BETWEEN 7000 AND 7500
 GROUP BY ENAME

要根据表中的员工进行聚合，请写为：

 SELECT ENAME,
        SUM(COMM) OVER (ORDER BY EMPNO ASC) as sum_sal,
        AVG(COMM) OVER (ORDER BY EMPNO ASC) as avg_sal,
        MAX(COMM) OVER (ORDER BY EMPNO ASC) as MAX_sal
 FROM @EMP
 WHERE EMPNO BETWEEN 7000 AND 7500

Answer 2

使用conditional Aggregate

SELECT ENAME,
       Sum(CASE
             WHEN EMPNO BETWEEN 7000 AND 7500 THEN COMM
             ELSE 0
           END) [Sum],
       Avg(CASE
             WHEN EMPNO BETWEEN 7000 AND 7500 THEN COMM
           END) [Avg]
FROM   EMP
GROUP  BY ENAME

Answer 3

尝试这样的事情：

SELECT ENAME, SUM(COMM), AVG(COMM)
FROM EMP
WHERE EMPNO BETWEEN 7000 AND 7500
GROUP BY ENAME

它会在{7000}到7500之间选择每个ENAME EMPNO，并为每个COMM获取{{1}}的总和和平均值。

显示来自多个select语句的数据

3 个答案: