How to insert a record and return the newly created ID using a single SqlCommand?

Question

I\'m using an SqlCommand object to insert a record into a table with an autogenerated primary key. How can I write the command text so that I get the newly created ID when I

Answer 1

Add the following line to the end of the Sql Query...

SELECT SCOPE_IDENTITY()

And then use the ExecuteScalar method on the SqlCommand object...

var rowCount = command.ExecuteScalar()

Answer 2

insert into Yourtable()  
values()  
SELECT SCOPE_IDENTITY()

I just ran a test and verified that the semi-colons are optional using SQL Server 2005 SP2, and .Net 3.5

Answer 3

Straight out of the Whirlpool:

If you're using MS SQL you can use "SELECT @@IDENTITY as Value" after your insert to get the last ID generated

and:

@@IDENTITY and SCOPE_IDENTITY return the last identity value generated in any table in the current session. However, SCOPE_IDENTITY returns the value only within the current scope; @@IDENTITY is not limited to a specific scope.

Edit: As pointed out in the comments, you should always use SCOPE_IDENTITY, not @@IDENTITY.

Answer 4

INSERT INTO YourTable(val1, val2, val3 ...) 
VALUES(@val1, @val2, @val3...);
SELECT SCOPE_IDENTITY();

Don't forget the semicolons at the end of each statement.

Answer 5

Immediately after your insert stmt, use

SELECT CAST(scope_identity() AS bigint) ---- incase you have a return result as int64

This will return the column created id/identity.

Answer 6

If your id is a Guid, then I found this solution to be best:

INSERT INTO YourTable (val1, val2, val3) 
OUTPUT inserted.id 
VALUES (@val1, @val2, @val3)

Thanks @Scott Ivey

Full demo:

    internal static Guid InsertNote(Note note)
    {
            Guid id;

            using (
                var connection =
                    new SqlConnection(ConfigurationManager.ConnectionStrings["dbconn"].ConnectionString))
            {
                connection.Open();
                using (
                    var command =
                        new SqlCommand(
                            "INSERT INTO Notes ([Title],[Text]) " +
                            "OUTPUT inserted.id " +
                            $"VALUES ('{title}','{text}');", connection))
                {
                    command.CommandType = CommandType.Text;
                    var reader = command.ExecuteReader();
                    reader.Read();
                    id = reader.GetGuid(reader.GetOrdinal("id"));
                }
                connection.Close();
            }

            return id;
    }

I would recommend using a Stored Procedure, but this is for unit testing our repository.