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LEFT JOIN did not differentiate the same table with different names
Posted by: noctua don
Date: February 03, 2012 08:58AM


I have some problem with the join funtionality.

Here are some of my tables:

Table: client
int id_client PRIMARY KEY

Table: client_has_phonenumber
int id_client
int id_phonenumber
composed primary key

Table: phonenumber
int id_phonenumber PRIMARY KEY
char(45) type PRIMARY KEY

Every client has two numbers: his private, and his mobile number. Now I want query both of them. to connect them with the client I have the table client_has_phonenumber with both ID's of the other tables as a composed primary key.

Here is my Query, but the problem with it is that he did not differentiate the phonenumber tables. i got always the same number and not two different ones.

Hope some one can help me.

FROM `client`
`phonenumber` AS `phonenumber_private`,
`phonenumber` AS `phonenumber_mobile`,
ON client.id_client = client_has_phonenumber.id_client
AND client_has_phonenumber.id_phonenumber = phonenumber_private.id_phonenumber
AND client.id_client = client_has_phonenumber.id_client
AND client_has_phonenumber.id_phonenumber = phonenumber_day.id_phonenumber
WHERE case.id_case = 2
AND phonenumber_private.type = 'private'
AND phonenumber_mobile.type = 'mobile'

Edited 1 time(s). Last edit at 02/03/2012 02:55AM by noctua don.

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LEFT JOIN did not differentiate the same table with different names
February 03, 2012 08:58AM

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