Charles,
I did not know that.
Thanks.
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Charles Wilt
Sent: Friday, 29 March 2013 12:29 p.m.
To: Midrange Systems Technical Discussion
Subject: Easy way to determine if two tables contain the same data
D
on't know if this technique has ever been posted here or not, but I ran across the technique last night on a DB2 LUW forum and it works just fine on DB2 for IBM i...
If you have a need to compare the contents of two tables to determine if they match, here's the easy way.
select * from table1
EXCEPT
select * from table2
In my case, I was refactoring some code and wanted to make sure that the output was still the same.
You can even use it on two different version of a table...you just have to do a bit more typing. Example: Original table has fld1, fld2 and new table has fld1,fld2, fld3.
select * from origtable
EXCEPT
select fld1,fld2 from newtable
I was doing it on 7.1, but according to the manual, except is supported starting at v5r4.
Cavats: the tables must have a primary key; or be a uniquely keyed physical.
HTH,
Charles
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