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How to define such view?
Message
De
01/03/2005 12:18:52
Jim Winter
Jim Winter Consulting
Hinesburg, Vermont, États-Unis
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 8 SP1
OS:
Windows XP SP2
Divers
Thread ID:
00991616
Message ID:
00991654
Vues:
18
This message has been marked as the solution to the initial question of the thread.
>>>Hi everybody,
>>>
>>>I have a problem to which I don't see an immediate solution, so I am hoping that great minds from UT can help me with it.
>>>
>>>I have a view
>>>CREATE SQL VIEW LV_SAVED_SEARCHES AS ;
>>>SELECT Saved_searches.* ;
>>>	FROM mmviscollect!saved_searches ;
>>>	WHERE Saved_searches.cusgrlink_fk = ( ?vp_cusgrlink_fk ) ;
>>>		OR Saved_searches.cusgrlink_fk = ( ?vp_vcam_fk ) ;
>>>	ORDER BY Saved_searches.isequence_number
>>>
>>>Now, in its current way it will always return all records, because we defined all of them for VCAM user. I want it to return "my" records if it finds that cUsgrLink_fk matches my cUsgrLink_fk. However, if I don't have records for my ID, I want it to return all records. Could you please help me a little bit?
>>>
>>>Thanks in advance.

Nadya,

OK, not tested, but this might work:
CREATE SQL VIEW LV_SAVED_SEARCHES AS ;
SELECT Saved_Searches.* ;
  FROM mmviscollect!saved_searches ;
 WHERE Saved_searches.cusgrlink_fk = ( ?vp_vcam_fk ) ;
   AND NOT EXISTS(SELECT * FROM mmviscollect!saved_searches ;
                   WHERE Saved_searches.cusgrlink_fk = ( ?vp_cusgrlink_fk )) ;
 UNION ;
SELECT Saved_Searches.* ;
  FROM mmviscollect!saved_searches ;
 WHERE Saved_searches.cusgrlink_fk = ( ?vp_cusgrlink_fk )
BTW, if you're comparing both parameters against the same foreign key, how can one return all the records and the other not be identical to return any records?

Regards,


HTH,
Jim
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