Question

i have 3 rows on “Services” table:

ID | name | ObrID
 0 |   A  |  1
 1 |   B  |  2
 2 |   C  |  -1

-1 is a none existing Obr, the service 2 doesn’t contains any Obr or it was deleted.

if i fetch with select * from Services, it works as expected, but if i do my search sql:

select 
    *,
    (select Name from Obrs where ID=ObrID) as ObrName
from
    Services
where
    (select Name from Obrs where ID=ObrID) like '%SEARCH_STRING%'

it doesn’t return the last line. Is there any way so it return something like:

ID | name | ObrID | ObrName
 0 |   A  |   1   |   ObrA
 1 |   B  |   2   |   ObrB
 3 |   C  |   -1  |   NULL

Answer 1

You want to use left join.

http://www.tizag.com/mysqlTutorial/mysqlleftjoin.php

SELECT s.*,o.ObrName from Services s
    LEFT JOIN Obrs o ON ID=ObrID
    WHERE OrbName LIKE '%$SEARCH_STRING%' OR OrbName IS NULL

or:

SELECT * FROM (select s.*,o.ObrName from Services s
    LEFT JOIN Obrs o ON ID=ObrID) tmp
    WHERE OrbName LIKE '%$SEARCH_STRING%' OR OrbName IS NULL