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Case statement help

Author

Topic

masond
Constraint Violating Yak Guru

447 Posts

Posted - 2013-09-10 : 08:37:34

Hey Guys

Hope your well, can you advise me what i am doing wrong
I trying to create a basic case statement
This is my query
Declare @FROM varchar(10)
Declare @TO varchar(10)
set @FROM = (select dateadd(MM,-1,max([Month_end_date]))
from [FDMS].[dbo].Fact_Fee_History)
set @TO = (select (max([Month_end_date]))
from Fact_Fee_History)

-- Products identifying Merchants who Have Clientline and Virtual Terminals ---
SELECT
FDMSAccountNo,
(max([Month_end_date])) as [Month_end_date],
case WHEN [Fee_Sequence_Number] = '32R' THEN 'Yes' ELSE 'No' END as Clientline,
case WHEN [Fee_Sequence_Number] = '6JT' THEN 'Yes' ELSE 'No' END as [VT]
FROM Fact_Fee_History
where (month_end_date BETWEEN @FROM and @TO)
and fdmsaccountno = '878755671889'
and Fee_Sequence_Number in ('32r', '6jt')
group by fdmsaccountno,[Fee_Sequence_Number]
order by FDMSAccountNo desc

But its returning the following results
FDMSAccountNo Month_end_date Clientline VT
878755671889 2013-08-01 Yes No
878755671889 2013-08-01 No Yes

Can anyone explain why ??

bandi
Master Smack Fu Yak Hacker

2242 Posts

Posted - 2013-09-10 : 08:45:28

For FDMSAccountNo = 878755671889 and Month_end_date = 2013-08-01 there are both sequence numbers '32r', '6jt'....

If you wish to have sinle line for each combination FDMSAccountNo you can query as follows:
SELECT
FDMSAccountNo,
max([Month_end_date]) as [Month_end_date],
MAX(case WHEN [Fee_Sequence_Number] = '32R' THEN 'Yes' ELSE 'No' END) as Clientline,
MAX(case WHEN [Fee_Sequence_Number] = '6JT' THEN 'Yes' ELSE 'No' END) as [VT]
FROM Fact_Fee_History
where (month_end_date BETWEEN @FROM and @TO)
and fdmsaccountno = '878755671889'
and Fee_Sequence_Number in ('32r', '6jt')
group by fdmsaccountno
order by FDMSAccountNo desc

--
Chandu

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