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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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