Actual inserted row ID

Question

I have created table in my db in this statement

CREATE TABLE tPerson
    (
        id INT NOT NULL PRIMARY KEY identity(1,1)
        , name NVARCHAR(100) not null
        , email NVARCHAR(30) not null
    )
GO

Now I insert new value with INSERT. My question is how can I get id of current added row? Any idea ??

Answer 1

Assuming SQL server, you should check out this article to gain a good understanding of retrieving identities.

Here's a snippet:

SELECT @@IDENTITY

It returns the last IDENTITY value produced on a connection, regardless of the table that produced the value, and regardless of the scope of the statement that produced the value. @@IDENTITY will return the last identity value entered into a table in your current session. While @@IDENTITY is limited to the current session, it is not limited to the current scope. If you have a trigger on a table that causes an identity to be created in another table, you will get the identity that was created last, even if it was the trigger that created it.

SELECT SCOPE_IDENTITY()

It returns the last IDENTITY value produced on a connection and by a statement in the same scope, regardless of the table that produced the value. SCOPE_IDENTITY(), like @@IDENTITY, will return the last identity value created in the current session, but it will also limit it to your current scope as well. In other words, it will return the last identity value that you explicitly created, rather than any identity that was created by a trigger or a user defined function.

SELECT IDENT_CURRENT(‘tablename’)

It returns the last IDENTITY value produced in a table, regardless of the connection that created the value, and regardless of the scope of the statement that produced the value. IDENT_CURRENT is not limited by scope and session; it is limited to a specified table. IDENT_CURRENT returns the identity value generated for a specific table in any session and any scope.

Answer 2

It looks like SQL Server, and it that case, just use:

INSERT INTO dbo.tPerson(....) VALUES(.....)

DECLARE @NewID INT
SELECT @NewID = SCOPE_IDENTITY()

SCOPE_IDENTITY returns the last inserted IDENTITY value in this current scope.

Side note: "email" is only 30 characters long!?!? I typically make that the longest column in my table - 200 chars or even more :-)