我想连接两个表,即使第二个表没有匹配项。
表用户:
uid | name
1 dude1
2 dude2
表账号:
uid | accountid | name
1 1 account1
我想要的表格:
uid | username | accountname
1 dude1 account1
2 dude2 NULL
我正在尝试的查询:
SELECT user.uid as uid, user.name as username, account.name as accountname
FROM user RIGHT JOIN account ON user.uid=accout.uid
我得到的是:
uid | username | accountname
1 dude1 account1
发布于 2013-06-07 23:09:24
请改用Left Join
SELECT user.uid as uid, user.name as username, account.name as accountname
FROM user LEFT JOIN account ON user.uid=accountid.uid
发布于 2013-06-07 23:10:46
右连接保留来自第二个表的所有结果(它将所有结果保存在右手边的表中),你想要一个左连接,或者在连接子句中交换用户和帐户的位置。
SELECT user.uid as uid, user.name as username, account.name as accountname
FROM user LEFT JOIN account ON user.uid=account.uid
我相信这样就可以了。
https://stackoverflow.com/questions/16987322
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