sql-查找具有五个以上成员的每个部门的平均工资 [英] sql - find average salary for each department with more than five members
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问题描述
不太确定如何获得这一点.我有一个职员表,我需要找到平均工资.我知道我可以使用use avg()
.但是,诀窍是我需要找到拥有5名以上职员的部门的平均值.我不确定是否应使用分组依据或使用方式.谢谢!
Not quite sure how to get this one. I have a staff table and I need to find the average salary. I know I can use use avg()
. But the trick is I need to find the average for departments that have more than 5 staff members. I'm not sure if I should use group by or how to use it. Thanks!
CREATE TABLE STAFF (STAFF_ID CHAR(3),
STAFF_NAME CHAR(20),
GENDER CHAR(6),
DEPARTMENT CHAR(20),
BOSS_ID CHAR(3)
SALARY NUMBER(8,2));
推荐答案
select DEPARTMENT,count(STAFF_ID) as CountStaff, avg(SALARY) as AVGSalary
from STAFF
group by DEPARTMENT
having count(STAFF_ID) > 5
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