Question

What is the way via a script to add a user to a database with permissions of select, insert, update and delete but only have access to that one database?

Answer 1

CREATE USER [user] FOR LOGIN [user]
EXEC sp_addrolemember N'db_datareader', N'your_db'
EXEC sp_addrolemember N'db_datawriter', N'your_db'
GO

Create a new db user in SQL Server 2005