• Subject: Re: FMTDTA
  • From: Jerry Feador <JLF@xxxxxxxxxxxxxxxx>
  • Date: Thu, 22 Jul 1999 10:14:14 -0700

In OPNQRYF don't forget the CPYFMQRYF (copy from query file) that I have used 
to create a hard, sorted file for multiple pass use...
Just a thought
Jerry

>>> "Joe Teff" <jteff19@idt.net> 07/22 8:00 AM >>>
>If you are writing new applications, may I suggest that you look at
embedded
>SQL first, and if that's not available to you, look at OPNQRYF.  Either of
>these are more modern than FMTDTA, and will do the same things.

That's true, but not neccessarily as efficient. SQL and OPNQRYF access
data randomly where FMTDTA (or SORT or whatever) physically sorts
the data into a temp file. If you are making more than one pass over the
exact same data (same selection and sort criteria) then FMTDTA can
be quicker as the blocks of records will be faster to retrieve from disk.

Joe Teff


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