An Overview of SQL Server Security
SQL Server security is built on a two-tier model. The first tier is access to SQL Server, which involves the person attempting to connect being authenticated as a valid SQL Server account, or login as it is known. Think of a login as being similar to entering an office tower and signing in with the security guard. The guard verifies that you have business in the building, and you head for the elevators. The second tier involves access to the databases. As SQL Server supports multiple databases, each database has its own security layer that provides access to that database through accounts known as users. These users are then mapped to the server logins to provide access. As users are created on a database-by-database ...
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