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Message Posted: Thu, 18 Jul 2002 @ 13:33:58 GMT


     
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Subj:   Re: The Optimizer and Multi Inlists
 
From:   Dieter Nöth

But I think your query alerts us to a deficiency in SQL. You can specify a single literal value or a list of values (corresponding to a column), but you cannot specify a list of values arranged in rows and columns. Since SQL is specifically meant for dealing with tables, this is a huge oversight.

This is called a "row value expression" and it's a part of SQL since SQL92, but i don't know if any RDBMS vendor implemented it ;-)


Wouldn't it be nice if you could write your query thus?

   Select *
   >From TableA
   Where (ColumnA, ColumnB, Geo_Area_ID,
          Csvy_Rspn_ID, Pop_Sub_Grp_ID, Csvy_Prod_ID)
   in
   ((182, 1, 1049, 101954, 100024, 100310),
    (182, 1, 1107, 101954, 100024, 100310),
    (182, 6, 1049, 101954, 100024, 100310),
    (182, 6, 1107, 101954, 100024, 100310)) ;

Would be nice e.g. for inserting serveral rows with a single insert statement.


Dieter



     
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