Creating Security Accounts

Each user must gain access to an instance of Microsoft® SQL Server™ through a login account that establishes the user's ability to connect (authentication). This login then has to be mapped to a SQL Server user account, which is used to control activities performed in the database (permissions validation). Therefore, a single login is mapped to one user account created in each database the login is accessing. If no user account exists in a database, the user cannot access the database even though the user may be able to connect to an instance of SQL Server.

The login is created in Microsoft Windows NT® 4.0 or Windows® 2000 rather than in SQL Server. This login is then granted permission to connect to an instance of SQL Server. The login is granted access within SQL Server.