根據另一個表結果進行更新

Question

我想根據另一個表結果集更新一個臨時表。

有什么建議么。 選擇查詢獨立工作。 但是我正在考慮與更新語句集成。

UPDATE #person_membership_promo_ext 
SET note_about=
(
    select note_text
    FROM note nt 
    INNER JOIN #person_membership_promo_ext per
      ON per.person_id=nt.main_ref_id
        and per.membership_type='P'
        and note_id=(select MAX(note_id)from note nt_1
    where nt_1.main_ref_id=per.person_id)
) 

Answer 1

UPDATE per
SET note_about=nt.note_text
FROM note nt 
INNER JOIN #person_membership_promo_ext per
  ON per.person_id=nt.main_ref_id
    and per.membership_type='P'
    and note_id=(select MAX(note_id)from note nt_1
where nt_1.main_ref_id=per.person_id)

Answer 2

您可以在更新語句中使用聯接

UPDATE per
SET note_about = nt.note_text
FROM #person_membership_promo_ext per
INNER JOIN note nt
  ON per.person_id=nt.main_ref_id
    and per.membership_type='P'
    and note_id = (
        select MAX(note_id) 
        from note nt_1
        where nt_1.main_ref_id = per.person_id
   )

Answer 3

干得好，

Update per
set per.note_about = nt.note_text
FROM note nt 
INNER JOIN #person_membership_promo_ext per
ON per.person_id=nt.main_ref_id
and per.membership_type='P'
and note_id=(select MAX(note_id)from note nt_1
where nt_1.main_ref_id=per.person_id)

我希望這個能幫上忙！