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Charles -
I have been using EXCEPTION JOIN since it became available, but I did not
know about this method of comparing two tables.
Thanks!
-sjl
"Charles Wilt" wrote in message
news:mailman.840.1364513333.7202.midrange-l@xxxxxxxxxxxx...
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
midrange.com
