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问题描述
我正在尝试使用以下 MySQL 查询来获取一些数据:
i'm trying the following MySQL query to fetch some data:
SELECT m.*, t.*
FROM memebers as m, telephone as t
INNER JOIN memeberFunctions as mf ON m.id = mf.memeber
INNER JOIN mitgliedTelephone as mt ON m.id = mt.memeber
WHERE mf.function = 32
但我总是收到以下错误:
But i always get the following error:
#1054 - Unknown column 'm.id' in 'on clause'
该列确实存在并且查询仅在一张表上工作正常(例如，当我移除电话时)
The column does exists and the query works fine with only one table (e.g. when i remove telephone)
有人知道我做错了什么吗?
Does anybody know what I do wrong?
推荐答案
看来你的要求是加入 members 表，但你加入的是 telephone 表.只需更改他们的顺序.
It seems your requirement is to join members table but you are joining with telephone table. just change their order.
SELECT
`m`.*,
`t`.*
FROM
`memebers` AS `m`
JOIN `telephone` AS `t`
JOIN `memeberFunctions` AS `mf`
ON `m`.`id` = `mf`.`memeber`
AND `mf`.`function` = 32
JOIN `mitgliedTelephone` AS `mt`
ON `m`.`id` = `mt`.`memeber`;
希望对你有帮助.谢谢！！
Hope this helps you. Thank you!!
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