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Some of the ways Query does stuff is a little crude.  For example, Query 
doesn't use any JOINs - it links files together only by using WHEREs. 
Therefore when you use options in Query like the matching records with 
primary file, kind of stuff what you get may not be what query actually 
uses.  Hence the command ANZQRY.  It tells you when RTVQMQRY will lie.

Also, your record selection can often be prettied up with the use of 
parenthesis - something Query sorely lacks.  For example how would you do 
the following in Query?
where (field1>100 and (field2>200 or field3<700))
And if you did figure out how to do it in Query, what would a RTVQMQRY of 
that query show you?

Rob Berendt

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