Question

I have googled this problem one week and no thing useful I think am not using the correct word

I am using SQL Server 2008 with t-sql and my need is to optimise my function when I insert a new row.

I have a table with first column is the key of integer autoincrement type and other columns are just for information

When we do an insert, SQL Server increments the key automatically and I have to do a select max to get the value, so is there a way like a global variable like @@IDENTITY or a function to avoid the begin end transaction and select max

Answer 1

Use SCOPE_IDENTITY:

-- do insert

SELECT SCOPE_IDENTITY();

Which will give you:

The last identity value inserted into an identity column in
the same scope. A scope is a module: a stored procedure, trigger,
function, or batch. Therefore, two statements are in the same scope if
they are in the same stored procedure, function, or batch.