Should you make multiple insert calls or pass XML?

Question

I have an account creation process and basically when the user signs up, I have to make entries in mutliple tables namely User, Profile, Addresses. There will be 1 entry in

Answer 1

For example assuming your xml as below

this would be your stored procedure

INSERT INTO Users (UserName) SELECT(UserName) FROM OPENXML(@idoc,'StoredProcedure/User',2)
WITH ( UserName NVARCHAR(256))

where this would provide idoc variable value and @doc is the input to the stored procedure

DECLARE @idoc INT

--Create an internal representation of the XML document.        
EXEC sp_xml_preparedocument @idoc OUTPUT, @doc

using similar technique you would run 3 inserts in single stored procedure. Note that it is single call to database and multiple address elements will be inserted in single call to this stored procedure.

Update

just not to mislead you here is a complete stored procedure for you do understand what you are going to do

USE [DBNAME]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER OFF
GO  
CREATE PROCEDURE [dbo].[procedure_name]
    @doc [ntext]
WITH EXECUTE AS CALLER
AS
DECLARE @idoc INT  
DECLARE @RowCount INT
SET @ErrorProfile = 0

--Create an internal representation of the XML document.
EXEC sp_xml_preparedocument @idoc OUTPUT, @doc

BEGIN TRANSACTION

INSERT INTO Users (UserName)
SELECT UserName FROM OPENXML(@idoc,'StoredProcedure/User',2)
WITH ( UserName NVARCHAR(256) )

-- Insert Address

-- Insert Profile


SELECT @ErrorProfile = @@Error                              

IF @ErrorProfile = 0
    BEGIN
            COMMIT TRAN
    END
ELSE
    BEGIN
            ROLLBACK TRAN
    END

EXEC sp_xml_removedocument @idoc