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Items in pnews.paradox-dos

Date:Fri, 6 Apr 2018 10:43:15 -0400
From:"Steven Green" <>
I haven't played with that in many years, but my guess is that paradox 
allowing a checkplus in selected fields, as apposed to all or nothing, is 
not reproducable in SQL.. probably done internally, the same way the "not" 
query is done.. create a too-big answer set, then reduce it, then display it

easier to explain with the "not" query.. it grabs everything the query 
requests, then does the "not" step separately.. you can can see that by 
testing the size of the answer table.. it might be empty, but it'll still be 
the size it was before it removed all the "not" records


Steven Green
Myrtle Beach, South Carolina, USA

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"Bernie van't Hof"  wrote in message 

Pdox allows a query to contain both CHECK's and CHECKPLUS's which roughly 
translate to SELECT DISTINCT and SELECT in sql.

sql does not allow both in the same query due to possible 

I thought I had this nailed, but on closer inspection it seems my 
recollection of how pdox works in this regard is not
so clear, although I do remember sometimes struggling to get the mix right.

Anyone help?

- Bernie 

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