使用 In 命令和 group by 子句

Question

我正在尝试从两个表（部门和人员）中获取一些数据，我的工作基本上是使用 in 子句。谁能帮我找出以下查询中的问题？

from email.department, email.person
where person.works_in in (select person.works_in from email.person
             having salary > avg(person.salary) group by (person.works_in));

ERROR:  syntax error at or near "group"
LINE 16:              having salary > avg(salary) group by (person.wo.

I am getting the above error

UPDATED: 
select person.works_in from email.person                    
group by person.salary,person.works_in
having salary > avg(salary);

the query is executed but, Now, I get nothing in the return value.

Answer 1

也许我错了，但在我看来，您希望 select 人 salary 高于平均水平。您可以在不使用 group by 和 having 的情况下实现它。我假设您的 table.

中每人一行

select works_in
from email.person
where salary > (select AVG(salary) from email.person)

使用 In 命令和 group by 子句

Working with In command and group by clause

mysql

sql

having-clause