Db Design for Matrix Lookup

[Ben]

Hi All,
I have to update a column in Table A based on 3 other columns in Table A
itself. I have an excel matrix like so
Column2-Value1 Column3-Value1 Column2-Value2

Column1-Value1 A B C
Column1 - Value2 V W X
and so on.. I am not able to think of a smart way to design this other
that the case statements?

Any help is appreaciated.
Thanks

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[Erland Sommarskog]

Ben (no****@devdex.com) writes:

I have to update a column in Table A based on 3 other columns in Table A
itself. I have an excel matrix like so
Column2-Value1 Column3-Value1 Column2-Value2

Column1-Value1 A B C
Column1 - Value2 V W X
and so on.. I am not able to think of a smart way to design this other
that the case statements?

It's not clear to me what the rules for the update are. For this kind of
question, it's always a good idea that you post:

o CREATE TABLE statement for your table.
o INSERT statements with sample data.
o The desired result given the sample.

--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
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[Ben]

Thanks for responding Erland, I figured it out finally, will post sample
scripts and solutions soon.
Thanks all.

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