Index_Col( table_name, index_id, N [, owner_id] )
Returns the column name of the Nth column in the specified index.
Example
select Index_Col( 'T_ProdBillOfMat', IndId, 1 )
from sysindexes
where Id = Object_Id('T_ProdBillOfMat')
and name = 'PK_T_ProdBillOfMat'
Difference
MS SQL Server only supports three arguments. The concept of ‘owners’ in MS SQL Server is implemented as ‘schemata’. The functionality is exactly the same as in ASE, since in MS SQL Server the syntax is as follows.
Index_Col( [[database.[schema].] | [schema.] table, index_id, N )