Sql 显示超过1的驾驶员和涉及的班次

这个代码不起作用。我知道需要在某个地方包含子查询，但我无法确定是什么和在哪里。谢谢。

解决了，这是答案

select dr_drvname, count(sh_drvnum)
from driver join shift on dr_drvnum = sh_drvnum
where count(sh_drvnum) not like '1'
group by dr_drvname;

---

或者，在加入之前预聚合计数：

select dr_drvname, count(sh_drvnum)
from driver join shift on dr_drvnum = sh_drvnum
group by dr_drvname
having count(sh_drvnum) > 1;

---

查找关键字

Having

感谢您的帮助，解决了这个问题。

select dr_drvname,
       shift_count
from   driver inner join (
         select   sh_drvnum,
                  count(*) shift_count
         from     shift
         group by sh_drvnum
         having   count(*) > 1) on (dr_drvname = sh_drvname)