我想将用户ID 1的年级值从tbl_profile更改为' 3rd',我想引用名称' captain america'从表中,因为它们具有相同的user_id。
这是我的示例表:
tbl_profile
users_id year_level
1 none
tbl_usersinfo
users_id full_name
1 captain america
这是我的查询:
UPDATE tbl_profile AS p
SET p.year_level = '3rd'
LEFT JOIN
tbl_usersinfo AS i
ON
i.users_id = p.users_id
WHERE
i.full_name = 'captain america';
我希望它是这样的,但我知道这个查询是不可能的,因为我还没有指定full_name列的来源:
UPDATE tbl_profile AS p
SET p.year_level = '3rd'
WHERE i.full_name = 'captain america'
LEFT JOIN
tbl_usersinfo AS i
ON
i.users_id = p.users_id
答案 0 :(得分:2)
使用此查询:
UPDATE tbl_profile
SET year_level='3rd'
WHERE users_id IN (
SELECT users_id
FROM tbl_usersinfo WHERE full_name = 'captain america');