Re: Speaking of SQL..... -- MIDRANGE-L

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Subject: Re: Speaking of SQL.....
From: Peter Dow <petercdow@xxxxxxxxx>
Date: Fri, 12 Mar 2021 13:48:07 -0800
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And some people tend to not understand the difference between a UNION and a
JOIN.

x years ago (I don't remember how many), I didn't even know there was a UNION, and then I had to figure out the difference between UNION and UNION ALL :)

JOIN is also interesting -- I'm not sure when I learned you could use a constant, e.g. flda = 'Y' in the JOIN ON clause. Makes JOIN ON sort of like a WHERE clause just for the JOIN process.

--
*Peter Dow* /
Dow Software Services, Inc.
909 793-9050
petercdow@xxxxxxxxx <mailto:petercdow@xxxxxxxxx>
pdow@xxxxxxxxxxxxxx <mailto:pdow@xxxxxxxxxxxxxx> /

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Re: Speaking of SQL..... , Niels Liisberg

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