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Try

And a.aentid < b.aentid


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-------- Original message --------
From: "Stone, Joel" <Joel.Stone@xxxxxxxxxx>
Date: 11/14/16 6:42 PM (GMT-05:00)
To: midrange-l@xxxxxxxxxxxx
Subject: SQL joining a table to itself - whats a good method to eliminate doubles

I want to join a table to itself to show all one-to-many records. Problem with code below is that each record appears twice.

What is a simple method to show record only once?

Thanks!






select distinct a.AHSCNBR ,
a.AENTID ,
b.AHSCNBR ,
b.AENTID

from bladdr a
join bladdr b on a.AHSCNBR = b.AHSCNBR
and a.AENTID <> b.AENTID


result:

0238559 A 0238559 B
0238559 B 0238559 A

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