Restrict the Connection to a Database in SQL

You can restrict the connection to a database by specifying Single User mode, as shown below:

USE master;GOALTER DATABASE YourDatabaseNameSET SINGLE_USERWITH ROLLBACK IMMEDIATE;GOALTER DATABASE YourDatabaseNameSET READ_ONLY;GOALTER DATABASE YourDatabaseNameSET MULTI_USER;GO

This means that only one person can connect to the database until it is set back to Multi User.

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