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INNER JOIN WITH SAME PRIMARY ID

Posted on 2013-12-24
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393 Views
Last Modified: 2013-12-26
I have 2 tables whit  this attributes
   TABLE A = person --> id | firstname  | lastname     |   jobtitle
   TABLE B = contact--> id | id_person  | description  | secondlastname
 
This is my query in mysql, operating correctly

$query_services = mysql_query("SELECT A.*,B.* FROM person A LEFT JOIN contact B ON A.id=B.person_id WHERE $con ORDER BY A.id ");

while ($row_services = mysql_fetch_array($query_services)) {
$id=$row_services['id'];
$nam=$row_services['firstname'];
$last=$row_services['lastname'];
$seclast=$row_services['secondlastname'];

MY PROBLEM IS
I WANT TO GET THE 'id' = $id OF TABLE 'person'
BUT, I get 'id' the table 'contact'. (I do not want that record)

should I do?
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Question by:pixegoo
3 Comments
 
LVL 45

Accepted Solution

by:
Kdo earned 220 total points
ID: 39738385
Hi pixegoo,

The query returns two columns labelled 'id' and you want a specific one.  Instead of selecting A.*, B.*, just select the columns that you want.

$query_services = mysql_query("SELECT A.*,B.id_person,m B.description, B.secondlastname FROM person A LEFT JOIN contact B ON A.id=B.person_id WHERE $con ORDER BY A.id ");

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Good Luck,
Kent
0
 
LVL 13

Expert Comment

by:magarity
ID: 39738388
Just itemize the fields you want instead of using A.* and B.*:  A.ID, A.firstname ... B.description, B.secondlastname
You do not need to SELECT fields in order to use them in JOIN or WHERE clauses. This will make sure you only get the ID from table A.
0
 
LVL 12

Expert Comment

by:North2Alaska
ID: 39738408
You can also specify an alias for the field.  

Select A.ID as PERSON_ID, B.ID as CONTACT_ID...

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