SQL Server Stored Procedure to Select/Update/Return
I am trying to write a SQL Server stored procedure that selects the top row from a table, updates a column in that row, an开发者_如何学Cd then returns this row with the changes.
For example:
row = SELECT TOP 1 FROM Requests
UPDATE Requests SET row.Locked = True
RETURN row
I can't seem to get this right..can someone point me in the right direction?
update top(1) Request
set Locked = 1
output inserted.*
where Locked = 0
A version when you need order by to get the row you want to modify.
Here you will set Locked=1
for the highest DateField
value where Locked = 0
Test data
create table Request(ID int, Locked bit, DateField datetime)
insert into Request values (1, 0, '20010101')
insert into Request values (2, 0, '20010102')
insert into Request values (3, 0, '20010103')
Update statement with cte
;with cte as
(
select *,
row_number() over(order by DateField desc) as rn
from Request
where Locked = 0
)
update cte
set Locked = 1
output inserted.ID, inserted.Locked, inserted.DateField
where rn = 1
Result
ID Locked DateField
----------- ------ -----------------------
3 1 2001-01-03 00:00:00.000
Or you could do this if you want to use inserted.*
instead of specifying the fields in output clause.
update Request
set Locked = 1
output inserted.*
from Request as r
inner join
(select ID, row_number() over(order by DateField desc) as rn
from Request
where Locked = 0) as rs
on r.ID = rs.ID and
rs.rn = 1
You can use an OUTPUT clause:
DECLARE @Results TABLE (SomeField INT)
UPDATE TOP (1) Requests
SET Locked = 1
OUTPUT inserted.SomeField INTO @Results (SomeField)
SELECT * FROM @Results
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