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Display query results even if I can't match 2 columns from 2 different tables

Posted on 2010-09-07
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Last Modified: 2013-12-13
Here is my query

SELECT hlp_hed_key, hlp_chan_num, hlp_callsign, FullName FROM gn_stage.stg_stations, gn_config.cfg_headend_lineup WHERE hlp_callsign=Call_Sign AND hlp_hed_key='$h' ORDER BY hlp_chan_num + 0 ASC

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I display the results of this query in my webpage.  The problem is that if hlp_callsign does not match a field in Call_Sign then the row doesn't display at all.  I would like to display all of the other data and perhaps show hlp_callsign in red indicating it is bad and needs edited.

Thanks for the help on this.
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Question by:kevandju
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cyberkiwi earned 500 total points
ID: 33621739
SELECT hlp_hed_key, hlp_chan_num, hlp_callsign, FullName
FROM gn_config.cfg_headend_lineup left join gn_stage.stg_stations
 ON hlp_callsign=Call_Sign
WHERE hlp_hed_key='$h'
ORDER BY hlp_chan_num + 0 ASC


It would be a good idea to alias the table names... and to indicate where each column comes from.
When the join doesn't match, hlp_callsign will be NULL, which you can check for in PHP and use to color the row/cell red.
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Author Comment

by:kevandju
ID: 33621857
Thank you that worked perfectly and I understand what you mean about the Aliases.
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