Re: Joining two same tables in different libraries using SQL

Dear All,

Dear All,

Thanks a lot for all the helpful replies.


I also found an exact example for what I need to do at this link: http://search400.techtarget.com/tip/0,289483,sid3_gci1027756_mem1,00.html

Here is a snippet:

"You can easily update a field in one file with SQL by using a field in another file where unique field matching is possible. In the example, I want to update all the load dates in FILE1 to contain the same load date as found in FILE2 matching the two files by company and claim.
COALESCE covers the situation where one field may contain a NULL.
Note that the field to be updated must be compatible with the field updated from.
UPDATE FILE1 A SET A.LOADDT = (SELECT COALESCE(B.LOADDT, A.LOADDT) FROM FILE2 B WHERE A.COMP = B.COMP AND A.CLAIM = B.CLAIM)"


Thanks and have a nice week-end

Dina

From: David.FOXWELL@xxxxxxxxx
To: midrange-l@xxxxxxxxxxxx
Date: Fri, 26 Feb 2010 12:57:55 +0100
Subject: RE: Joining two same tables in different libraries using SQL

-----Message d'origine-----
[mailto:midrange-l-bounces@xxxxxxxxxxxx] De la part de dina ramzy
SELECT A.FLD12, B.FLD12
FROM LIB1.TABLE1 A, LIB2.TABLE1 B
WHERE
A.KEYFLD1 = B.KEYFLD1 AND
A.KEYFLD2 = B.KEYFLD2


Now I want to update table A and set FLD12 to be the same as the corresponding one in table B (A.FLD12 = B.FLD12)
Could you please help me in writing this SQL statement.

UPDATE update_table U SET myfield = (SELECT M.MyField FROM MasterTable M WHERE U.MyKey=
M.MyKey) WHERE U.MyKey IN (SELECT U.MyKey FROM MasterTable M)
And read the valuable lesson from Charles Wilt to myself here : http://archive.midrange.com/midrange-l/200904/msg00775.html
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