SQL: Update a row and returning a column value wit

问题:

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.

回答1:

You want the OUTPUT clause

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

回答2:

Accesses table only once :

UPDATE Items SET Clicks = Clicks + 1 , @Name = Name WHERE Id = @Id;
select @name;

回答3:

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

回答4:

Use a Stored procedure for this.

回答5:

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.

回答6:

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'