Returns the schema name associated with a schema ID.
Transact-SQL Syntax Conventions
SCHEMA_NAME ( [ schema_id ] )
schema_id
The ID of the schema. schema_id is an int. If schema_id is not defined, SCHEMA_NAME will return the name of the default schema of the caller.
sysname
Returns NULL when schema_id is not a valid ID.
SCHEMA_NAME returns names of system schemas and user-defined schemas. SCHEMA_NAME can be called in a select list, in a WHERE clause, and anywhere an expression is allowed.
SELECT SCHEMA_NAME(); GO
USE AdventureWorks; GO SELECT SCHEMA_NAME(5); GO