使用另一個表和INNER JOIN更新表

Question

我在使用MYSQL update和inner join聯接時遇到問題。

我需要使用另一個表來連接屬性。

我的查詢：

update cfc_registration
 set teams = concat(r.teams, " - ", u.firstname, " ", u.lastname)
 from cfc_registration as r
 inner join cfc_user as u
 on r.cfcUserId = u.id
 where r.cfcTournamentId = 5

錯誤信息 ：

 #1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'from cfc_registration as r inner join cfc_user as u on r.cfcUserId = u.id whe' at line 3

Answer 1

不確定FROM和INNER JOIN可以在更新查詢中使用。 嘗試以下方法：

update cfc_registration r, cfc_user u
set teams = concat(r.teams, " - ", u.firstname, " ", u.lastname)
where r.cfcTournamentId = 5 and r.cfcUserId = u.id

Answer 2

嘗試這個

UPDATE cfc_registration as r
inner join cfc_user as u
on r.cfcUserId = u.id
and r.cfcTournamentId = 5 set teams = concat(r.teams, " - ", u.firstname, " ",    u.lastname)