MySql：通過增加額外欄位，將不相關的結果集關聯起來
阿新 • • 發佈：2019-02-17
select
sit as '區域', ordC as '訂單數', cusC as '客戶數'
from (
select case bt1.cl
when 1 then '西區'
when 2 then '東區'
when 3 then '南區'
when 4 then '北區'
end,
bt1.c,
bt2.c
from (
select count