DATABASE_PRINCIPAL_ID (Transact-SQL)
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics
This function returns the ID number of a principal in the current database. See Principals (Database Engine) for more information about principals.
Transact-SQL syntax conventions
Syntax
DATABASE_PRINCIPAL_ID ( 'principal_name' )
Note
To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.
Arguments
principal_name
An expression of type sysname, that represents the principal. When principal_name is omitted, DATABASE_PRINCIPAL_ID
returns the ID of the current user. DATABASE_PRINCIPAL_ID
requires the parentheses.
Return types
int
NULL if the database principal does not exist.
Remarks
Use DATABASE_PRINCIPAL_ID
in a select list, a WHERE clause, or any place that allows an expression. See Expressions (Transact-SQL) for more information.
Examples
A. Retrieving the ID of the current user
This example returns the database principal ID of the current user.
SELECT DATABASE_PRINCIPAL_ID();
GO
B. Retrieving the ID of a specified database principal
This example returns the database principal ID for the database role db_owner
.
SELECT DATABASE_PRINCIPAL_ID('db_owner');
GO
See also
Principals (Database Engine)
Permissions Hierarchy (Database Engine)
sys.database_principals (Transact-SQL)
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