IF funcionality in SQL server views

Hi,
I am working with several tables and views. My goal is to create a view
with critical reporting data from these tables and views. I have
managed to get the majority of data but am having difficultly with the
final step.
For a record in the master dataview, add additional record information
by appending data from another view based on the first 2 letters of the
document number and the document number i.e
Document number
SC11111
DN22222
SI33333
For SC11111 look up data in Sales Credit table/view for doument SC11111
and append to that line
For DN22222 look up data in Delivery Note table/view for document
DN22222and append to that line
For SI33333 look up data in Sales Invoice table/view for document
SI33333 and append to that line
Any help appreciated.
Thank you in advance,
Raj
Can I just clarify what you're trying to do...
as I understand it, you want to select from different tables/views
depending on what the data is.
if so, could you left join on all 3 tables, then using join filters and
using isnull() in your select you could just get the data from the
relevant table.
Otherwise, could you explain a bit further what the problem is.
Cheers
Will
|||If you want to conditional view, you can make a view using Multi-statement
Function.
"the_raj"?? ??? ??:

> Hi,
> I am working with several tables and views. My goal is to create a view
> with critical reporting data from these tables and views. I have
> managed to get the majority of data but am having difficultly with the
> final step.
> For a record in the master dataview, add additional record information
> by appending data from another view based on the first 2 letters of the
> document number and the document number i.e
> Document number
> SC11111
> DN22222
> SI33333
> For SC11111 look up data in Sales Credit table/view for doument SC11111
> and append to that line
> For DN22222 look up data in Delivery Note table/view for document
> DN22222and append to that line
> For SI33333 look up data in Sales Invoice table/view for document
> SI33333 and append to that line
> Any help appreciated.
> Thank you in advance,
> Raj
>
|||Since you haven't provided the ddls I will try to explain it with a snippet.
CREATE VIEW MASTER_VIEW
AS
SELECT A.*, B.*
FROM MASTER_DATA A, SALES_CREDIT B
WHERE SUBSTRING(A. DOCUMENT_NUMBER,1,2) = 'SC'
AND <JOIN CODITIONS>
UNION ALL
SELECT A.*, C.*
FROM MASTER_DATA A, DELIVERY_NOTE C
WHERE SUBSTRING(A. DOCUMENT_NUMBER,1,2) = 'DN'
AND <JOIN CODITIONS>
UNION ALL
SELECT A.*, B.*
FROM MASTER_DATA A, SALES_INVOICE C
WHERE SUBSTRING(A. DOCUMENT_NUMBER,1,2) = 'SI'
AND <JOIN CODITIONS>
--Note: do not use select *
-- and I assume the 3 selects that are unioned will be having the same schema
sql