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06.03.2008 at 06:54AM PDT, ID: 23453119
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Multiple UNION with VERSION field...

Asked by bganoush in DB2 Database, Databases Miscellaneous, Data Mining

Tags: DB2

I need help.

I have three tables, CROSSREF, NAMEREF and EMPREF defined with these fields:

EMPREF contains EMPID, VERSION and MGRCODE
CROSSREF contains EMPID and NAMEID
NAMEREF contains NAMEID, FULLNAME

What I need to do is to pull out all the employees with MGRCODE = '1' and then pull out all the FULLNAME values from NAMEREF. The NAMEREF is taken from crossreferencing the CROSSREF table with the EMPID to get a NAMEID.  To make things worse, the VERSION field is a timestamp where there could be more than one VERSION of the same employee. I only need the latest one.

I'm not really sure how to do this... Is it a simple Union or a join?  And how do I deal with the VERSION, is there a way to get the most recent one?

Please help!

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[+][-]06.03.2008 at 07:10AM PDT, ID: 21700591

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Zones: DB2 Database, Databases Miscellaneous, Data Mining
Tags: DB2
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Solution Provided By: momi_sabag
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Solution Grade: A
 
 
[+][-]06.03.2008 at 09:03AM PDT, ID: 21701772

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[+][-]06.03.2008 at 09:09AM PDT, ID: 21701831

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[+][-]06.03.2008 at 09:16AM PDT, ID: 21701922

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[+][-]06.03.2008 at 09:52AM PDT, ID: 21702239

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[+][-]06.03.2008 at 09:57AM PDT, ID: 21702276

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[+][-]06.03.2008 at 10:13AM PDT, ID: 21702437

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