php - 在 2 个表中搜索唯一条目，然后更改数据

Question

目标是在两个相似的表中搜索单行数据。

UPDATE
regusers_test AS rt
INNER JOIN
alt_toon_test AS att
ON
att.`toonname` = rt.`toonname`
SET
rt.`server` = CASE WHEN rt.`username`='$user' AND rt.`server`='$oserver' AND rt.`toonname`='$otoon' THEN '$server' ELSE rt.`server`
att.`server` = CASE WHEN att.`username`='$user' AND att.`server`='$oserver' AND att.`toonname`='$otoon' THEN '$server' ELSE att.`server`
WHERE
(
rt.`username`='$user' AND rt.`server`='$oserver' AND rt.`toonname`='$otoon'
)
OR
(
att.`username`='$user' AND att.`server`='$oserver' AND att.`toonname`='$otoon'
)

但我不断得到：

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 'att.'server'=Case When att.'username'='$user'...

周末我做了很多谷歌搜索，但找不到解决方案。希望这里有人知道发生了什么。

Answer 1

SET 需要 , 在分配之间。

编辑修复了您的查询：

UPDATE
regusers_test AS rt
INNER JOIN
alt_toon_test AS att
ON
att.`toonname` = rt.`toonname`
SET
rt.`server` = CASE WHEN rt.`username`='$user' AND rt.`server`='$oserver' AND rt.`toonname`='$otoon' THEN '$server' ELSE rt.`server`,
att.`server` = CASE WHEN att.`username`='$user' AND att.`server`='$oserver' AND att.`toonname`='$otoon' THEN '$server' ELSE att.`server`
WHERE
(
rt.`username`='$user' AND rt.`server`='$oserver' AND rt.`toonname`='$otoon'
)
OR
(
att.`username`='$user' AND att.`server`='$oserver' AND att.`toonname`='$otoon'
)

Answer 2

你只是错过了,附近的列之间

SET
rt.`server` = CASE WHEN rt.`username`='$user' AND rt.`server`='$oserver' AND rt.`toonname`='$otoon' THEN '$server' ELSE rt.`server` END ,
att.`server` = CASE WHEN att.`username`='$user' AND att.`server`='$oserver' AND att.`toonname`='$otoon' THEN '$server' ELSE att.`server` END