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  3. July 2004

RE: SQL vs. traditional I/O?

   At 10:16 AM 7/23/2004, Rob wrote:

     The ONLY advantage DDS has over SQL is the ability to combine an index
     with
     a view.  Or, in DDS terms, the ability to create a logical file with
     field
     and/or record selection and a key.  However this is only an advantage in
     traditional I/O.  In SQL I/O you would read the 'view' or the file with
     the
     field and/or record selection.  And the optimizer would use the
     appropriate
     'index' to find the best key.

   The other thing that DDS _can_ bring to the table is using field reference
   files, if you design your files that way.  Not do-able in SQL if I
   remember right.

   Jim

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