Interview Questions

1. What are Orphaned Users?

A database user for which the corresponding SQL Server login is undefined or is incorrectly defined on a server instance cannot log in to the instance. Such a user is said to be an orphaned user of the database on that server instance.

  • A database user can become orphaned if the corresponding SQL Server login is dropped.
  • A database user can become orphaned after a database is restored or attached to a different instance of SQL Server.
  • Orphaning can happen if the database user is mapped to a SID that is not present in the new server instance.

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