任何一個可以改變這個查詢刪除

Question

select a.courseid from branch b 
    left outer join course a on a.courseid = b.courseid 
where a.courseid is NULL 

我想刪除這是由該查詢

Answer 1

DELETE a 
FROM branch b 
     left outer join course a 
      on a.courseid = b.courseid 
where a.courseid is NULL 

給出行這是你想要的嗎？

Answer 2

它看起來像你想刪除課程表中沒有courseid的分支記錄。如果這是正確的，那麼：

delete b 
    from branch b 
     left outer join course a 
      on a.courseid = b.courseid 
    where a.courseid is NULL