I have the below SQL Server query to update column type in tblTicket:
UPDATE A set type=B.type
FROM tblTicket A
JOIN (select b.tblTicket_id,a.type
from tblP a
JOIN tblA b ON a.allocation_id = b.id
WHERE b.tblTicket_id =@tblTicket_id Group By b.tblTicket_id,a.type) B
ON A.id=b.tblTicket_id
I also want to update column bid in table tblTicket, but only if a.name = "ML":
UPDATE A set bid = B.id
FROM tblTicket A
JOIN (select b.tblTicket_id,f.id
FROM tblP a
JOIN tblA b ON a.allocation_id = b.id
JOIN FIRM f ON f.firm = a.firm
WHERE b.tblTicket_id =@tblTicket_id and a.name = 'ML' Group By b.tblTicket_id,f.id) B
ON A.id=b.tblTicket_id
Can I combine the 1st query with the 2nd query above ? Thank you.
Using CASE
you can update a column if a certain condition is satisfied, otherwise you can "set" that column with the same value.
A "best practice" tip: avoid using same aliases (even switching from uppercase to lowercase and vice-versa) in your nested queries.
UPDATE A set type=B.type,
bid = case when a.name = 'ML' then B.id else bid end
FROM tblTicket A
JOIN (select b.tblTicket_id,a.type
from tblP a
JOIN tblA b ON a.allocation_id = b.id
WHERE b.tblTicket_id =@tblTicket_id Group By b.tblTicket_id,a.type) B
ON A.id=b.tblTicket_id
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