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The results that you'll get from SQL highly depend on the type of query that you are building.
Is it a natural join? Left join? Right join? Inner join?
For my taste and better control of the dataset resulting from the query, I always prefer to identify the primary table first, then do LEFT JOIN with the rest of the tables.
Please post your code here so we can help you better.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Campin
Sent: Tuesday, August 17, 2010 4:08 PM
To: Midrange Systems Technical Discussion
Subject: Sql Question
I have an SQL statement that compares data in for one table in two different
libraries. The SQL just says report any record where the initials are
different but when I run it I get nothing.
I had one record where the initials for in one record was Null and in the
other FUL but the SQL reported them as equal. That doesn't make much sense.
Does SQL bypass the test if one side is null? Isn't null just a absence of
data so they would not be equal? Have I found a bug (A big one?
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