COL_NAME (Transact-SQL)
Applies to:
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Azure Synapse Analytics
Analytics Platform System (PDW)
This function returns the name of a table column, based on the table identification number and column identification number values of that table column.
Transact-SQL syntax conventions
Syntax
COL_NAME ( table_id , column_id )
Note
To view Transact-SQL syntax for SQL Server 2014 (12.x) and earlier versions, see Previous versions documentation.
Arguments
table_id
The identification number of the table containing that column. The table_id argument has an int data type.
column_id
The identification number of the column. The column_id argument has an int data type.
Return types
sysname
Exceptions
Returns NULL on error, or if a caller does not have the correct permission to view the object.
In SQL Server, a user can only view the metadata of securables that the user owns, or on which the user has been granted permission. This means that metadata-emitting, built-in functions such as COL_NAME
might return NULL, if the user does not have correct permissions on the object. See Metadata Visibility Configuration for more information.
Remarks
The table_id and column_id parameters together produce a column name string.
See OBJECT_ID (Transact-SQL) for more information about obtaining table and column identification numbers.
Examples
This example returns the name of the first column in a sample Employee
table.
-- Uses AdventureWorks
SELECT COL_NAME(OBJECT_ID('dbo.FactResellerSales'), 1) AS FirstColumnName,
COL_NAME(OBJECT_ID('dbo.FactResellerSales'), 2) AS SecondColumnName;
Here is the result set.
ColumnName
------------
BusinessEntityID
See also
Expressions (Transact-SQL)
Metadata Functions (Transact-SQL)
COLUMNPROPERTY (Transact-SQL)
COL_LENGTH (Transact-SQL)
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