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Parsing field value based upon derived dataset

Posted on 2008-10-23
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Last Modified: 2012-05-05
Experts

I am attempting to CASE a column in a view based upon a select against a separate table.

The select will return a number of distinct values; this will then be used to CASE the column in the view. This column will contain space-separated values in the form '1 2 3 4 5 A C D', etc

Consequently, if the select statements returns values of 1,2,3 and any or all of these values appears in the view column, the column should be updated as 'COMPLIANT' for example.

We're no doubt looking at a UDF here but any pointers you could offer would be appreciated.

Thanks


JC
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Question by:campbell1972
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Daniel Wilson earned 500 total points
ID: 22786058
>>space-separated values

That design is a violation of first normal form -- and makes stuff like this MUCH harder.  Is correcting the design an option at this point?

Assuming it is not ... perhaps something like ...

Select CASE When (Select count(*) From MainTable Inner Join otherTable on MainTable.SpaceSeparatedColumn like '%' + otherTable.DistinctValue + '%') > 0 then 'COMPLIANT' else 'Not Compliant' END
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Author Comment

by:campbell1972
ID: 22786126
Hi Daniel

Unfortunately the design is inherited and due to pressure of timescale there is very little I can do about that.

However, what you have suggested does sound like a possibility. I'll investigate further and get back to you.


JC
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LVL 32

Expert Comment

by:Daniel Wilson
ID: 22786380
OK, if you need code that more closely fits your table structure, please post that structure.
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