I would like to convert the below logic into a SQL query, and i know that it can be acheived using a CASE WHEN THEN ELSE statement , but i am not sure how i can put it together in the query. Please help.
If point 5 is null then use AG_AGENTS.SALES_AREA_DESC
The new field can be called as SALES_AREA_DESC_2
The general logic is:
select
CASE WHEN test1 = 'a' THEN 1
WHEN test1 = 'b' THEN 2
WHEN (test1 = 'c') AND (test2 is null) THEN 3
ELSE 0 END as myfield
from mytable
In your case, if I understand your query correctly it is:
CASE WHEN (AG_AGENTS.SALES_AREA_DESC = Dom. - NAT)
AND (ISNULL(PX_PAXWEB.COUNTRY,'') = AUT) THEN PX_PAXWEB.POSTCODE
WHEN (AG_AGENTS.SALES_AREA_DESC = Dom. - NAT)
AND (ISNULL(PX_PAXWEB.COUNTRY,'') <> AUT) THEN vwPxPaxweb.SALES_AREA
WHEN (AG_AGENTS.SALES_AREA_DESC = Dom. - NAT)
AND (PX_PAXWEB.COUNTRY is null) THEN AG_AGENTS.SALES_AREA_DESC
WHEN (AG_AGENTS.SALES_AREA_DESC = Int. – Inbound)
THEN vwPxPaxweb.SALES_AREA
WHEN (AG_AGENTS.SALES_AREA_DESC = Int. – Inbound)
THEN AG_AGENTS.SALES_AREA_DESC
WHEN (AG_AGENTS.SALES_AREA_DESC is null)
OR (Int. is null) OR (Inbound is null)
THEN AG_AGENTS.SALES_AREA_DESC
ELSE AG_AGENTS.SALES_AREA_DESC -- or some other exit value
END as SALES_AREA_DESC_2
Note: a few thing are not clear from your questions so I had to make assumptions: - Assumed "Dom.", "NAT", etc are fields (bit odd w the dot..) - I'm not sure which fields can be NULL (re: "If point 2 and/or 3 is null ", etc), so I picked all for the last branch of the case. So you can figure out the rest.
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