Using Case Statement to replace value in one field based on value in a seperate field - sql

Question

I'm creating a report in SSRS and I can't use the IIF statement within the report to get the following done. I'm getting aggregate errors when I try to sum within the SSRS report.
`IIF(Fields!Period=0,0,IIF(Period=13,0,Balance/12))`
Works fine up until the moment I try to Sum.. get a silly aggregate error "Aggregate functions other than First, Last, Previous, Count, and Count Distinct can only aggregate data of a single data type"... These are all integers.
Basically I have a value in Master.Balance that I need to divide by 12 only when Secondary.Period equals 0 or 13. If Secondary.Period equals 0 or 13 then the value should be 0. I know my problem has to do with including the relationship between the tables, but I just don't know how to write that in.
Here is what I'm trying to use:
`CASE
WHEN Secondary.Period=0 OR Secondary.Period=13
THEN 0
ELSE Master.Balance/12
End As BudByPer`
Here is how the two tables are related to each other:
`FROM Master LEFT OUTER JOIN Secondary
ON Master.Project = Secondary.Project
AND Master.object = Secondary.object
AND Master.org = Secondary.org
`
How do I get the above into this:
SELECT DISTINCT Master.Project, Master.Object, Master.Fund, Master.Segment, Master.Balance, Secondary.project, Secondary.object, Secondary.org, Secondary.Period, Secondary.object, Secondary.Project.
FROM Master LEFT OUTER JOIN Secondary
ON Master.Project = Secondary.Project
AND Master.object = Secondary.object
AND Master.org = Secondary.org
WHERE (Master.object>=600000)
ORDER BY [Master.Fund]

Answer 1

You just need a select, it looks fine to me...
SELECT
Master.account,
Master.segment,
Secondary.desc,
Secondary.bud,
Segment.Num,
Segment.office,
CASE
WHEN Secondary.Period=0 OR Secondary.Period=13 THEN 0
ELSE Master.Balance/12
End As BudByPer
FROM Master
LEFT JOIN Secondary
ON Master.Project = Secondary.Project
AND Master.object = Secondary.object
AND Master.org = Secondary.org