CREATE APPLICATION ROLE (Transact-SQL)
Adds an application role to the current database.
Applies to: SQL Server (SQL Server 2008 through current version).
Password complexity is checked when application role passwords are set. Applications that invoke application roles must store their passwords. Application role passwords should always be stored encrypted.
Application roles are visible in the sys.database_principals catalog view.
For information about how to use application roles, see Application Roles.
Beginning with SQL Server 2005, the behavior of schemas changed. As a result, code that assumes that schemas are equivalent to database users may no longer return correct results. Old catalog views, including sysobjects, should not be used in a database in which any of the following DDL statements have ever been used: CREATE SCHEMA, ALTER SCHEMA, DROP SCHEMA, CREATE USER, ALTER USER, DROP USER, CREATE ROLE, ALTER ROLE, DROP ROLE, CREATE APPROLE, ALTER APPROLE, DROP APPROLE, ALTER AUTHORIZATION. In such databases you must instead use the new catalog views. The new catalog views take into account the separation of principals and schemas that was introduced in SQL Server 2005. For more information about catalog views, see Catalog Views (Transact-SQL).
The following example creates an application role called weekly_receipts that has the password 987Gbv876sPYY5m23 and Sales as its default schema.
CREATE APPLICATION ROLE weekly_receipts WITH PASSWORD = '987G^bv876sPY)Y5m23' , DEFAULT_SCHEMA = Sales; GO