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SQL Formula Syntax - Part 2

Posted on 2004-08-04
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Last Modified: 2008-01-09
Is it possible to nest 'CASE' statements in an SQL Column formula?

I tried do that and it doesn't seem to work. I'm not sure if I have a small error somewhere or if that is just impossible.

The statement I am trying is this:

Convert(money, (CASE WHEN ([DateCompleted] IS NOT NULL) THEN
(CASE WHEN ([JobType] = 'Partner) THEN round(([TotalRewardBase] * [PartnerPercent]),2)
ELSE round(([TotalRewardBase] * [PartnerPlusPercent]),2))
ELSE 0 END),2)

Is there something else that can be done to handle more complex logic?

I also tried introducing another column called PartnerPercentUsed. It has the following formula:

CASE WHEN ([JobType] = 'Partner') THEN [PartnerPercent] ELSE [PartnerPlusPercent] END

This works fine by itself, and (theoretically) allows me to simplify the other logic as follows:

Convert(money,(CASE WHEN ([DateCompleted] IS NOT NULL) THEN round(([TotalRewardBase] * [PartnerPercentUsed]),2) ELSE 0 END),2)

But this is not accepted.

Is it possible to have formula-driven columns which depend on other formula-driven columns?

Thanks, Ted
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Question by:tk3
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Ken Selvia earned 2000 total points
ID: 11723208
It worked fine for me. I had to add a ' after Partner and removed some extra () and added a missing END

create table tc (DateCompleted datetime, JobType varchar(10), TotalRewardBase float, PartnerPercent int, PartnerPlusPercent int)
insert tc select '1-1-04','Partner',10,10,4

alter table tc add c1 as

Convert(money,
      CASE WHEN [DateCompleted] IS NOT NULL THEN
            CASE WHEN ([JobType] = 'Partner') THEN
                  round([TotalRewardBase] * [PartnerPercent],2)
               ELSE
                  round([TotalRewardBase] * [PartnerPlusPercent],2)
            END
      ELSE
            0
      END,2)

select * from tc
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