Question

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

But i always get the following error:

#1054 - Unknown column 'm.id' in 'on clause'

The column does exists and the query works fine with only one table (e.g. when i remove telephone)

Does anybody know what I do wrong?

Answer 1

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`;

Hope this helps you. Thank you!!