Sql 如何向GROUPBY语句中添加列？

如何将

dumb1.court#

添加到我的分组依据？

groupby dumb1.court#，court1.courtname

在我看来，加入

labdatas18.court

是不必要的，因为您需要的所有内容都在其他表中。

select 
    dumb1.court#, court1.courtname, count(judgename) as "number of judges"
from 
    labdatas18.court court1 
left join 
    labdatas18.judge on court1.court# = labdatas18.judge.court#
inner join 
    labdatas18.court dumb1 on dumb1.court# = court1.court#
group by 
    court1.courtname;

select dumb1.court#, court1.courtname, count(judgename) as "number of judges"

from labdatas18.court court1 left join labdatas18.judge

on court1.court# = labdatas18.judge.court#

inner join labdatas18.court dumb1

on dumb1.court# = court1.court#

Group by dumb1.court#, court1.courtname;