SQL Server SQL: Update a row and returning a column value with 1 query

mhd8tkvw  于 2023-06-04  发布在  其他
关注(0)|答案(7)|浏览(314)

I need to update a row in a table, and get a column value from it. I can do this with

UPDATE Items SET Clicks = Clicks + 1 WHERE Id = @Id;
SELECT Name FROM Items WHERE Id = @Id

This generates 2 plans/accesses to the table. Is possibile in T-SQL to modify the UPDATE statement in order to update and return the Name column with 1 plan/access only?

I'm using C#, ADO.NET ExecuteScalar() or ExecuteReader() methods.

z0qdvdin

z0qdvdin1#

You want the OUTPUT clause

UPDATE Items SET Clicks = Clicks + 1
OUTPUT INSERTED.Name
WHERE Id = @Id
l3zydbqr

l3zydbqr2#

Accesses table only once :

DECLARE @Name varchar(MAX);

UPDATE Items SET Clicks = Clicks + 1 , @Name = Name WHERE Id = @Id;
SELECT @Name;
41ik7eoe

41ik7eoe3#

If you're using SQL Server 2005 onwards, the OUTPUT clause is ideal for this

disbfnqx

disbfnqx4#

Use a Stored procedure for this.

ars1skjm

ars1skjm5#

Create a stored procedure that takes the @id as a parameter and does both of those things. You then use a DbDataAdapter to call the stored procedure.

dy2hfwbg

dy2hfwbg6#

I could not manage to update and return one row inside a select statement. I.e you can not use the selected value from the other answers.

In my case, I wanted to use the selected value in a query. The solution I came up with was:

declare @NextId int
set @NextId = (select Setting from Settings where key = 'NextId')

select @NextId + ROW_NUMBER() over (order by SomeColumnOfYourTable) from YourTable

update Settings set Setting = Setting + @@ROWCOUNT 
where key = 'NextId'
2q5ifsrm

2q5ifsrm7#

I needed this in sqlite.

In sqlite you can do this by using the Returning clause.

UPDATE Items SET Clicks = Clicks + 1
WHERE Id = @Id
Returning Name

For more info see: https://www.sqlite.org/lang_returning.html

You can also return all fields like this:

UPDATE Items SET Clicks = Clicks + 1
WHERE Id = @Id
Returning *

相关问题