mysql - 带有两个表的 Mysql UPDATE 查询

Question

我想运行这个查询：

UPDATE up SET up.pts = uc.checkin_worth WHERE uc.email = up.email AND uc.company_id = up.company_id AND uc.email = 'test@gmail.com' AND uc.company_id = '4' AND uc.qrcode = 'j'

但是，我收到一个错误，因为我不知道如何在 UPDATE 查询中组合两个表（uc 和 up）。

谁能帮我解决这个问题？

谢谢，

Answer 1

只需使用正常的 JOIN 语法：

UPDATE up JOIN uc ON uc.email = up.email AND uc.company_id = up.company_id
SET up.pts = uc.checkin_worth
WHERE uc.email = 'test@gmail.com' AND uc.company_id = '4' AND uc.qrcode = 'j'

您还可以使用旧的逗号语法，它更类似于您的原始查询：

UPDATE uc, up
SET up.pts = uc.checkin_worth
WHERE uc.email = up.email
AND uc.company_id = up.company_id
AND uc.email = 'test@gmail.com'
AND uc.company_id = '4'
AND uc.qrcode = 'j'

Answer 2

试试这个：

UPDATE up, uc 
SET up.pts = uc.checkin_worth, 
WHERE uc.email = up.email AND uc.company_id = up.company_id AND uc.email = 'test@gmail.com' AND uc.company_id = '4' AND uc.qrcode = 'j'