Specify the name of the column that is to be used in conjunction with the operations(s) to evaluate the select/omit expression.
This column must be specified if the Select/Omit Type is RANGE, VALUES or COMP.
Column named must be defined in the table definition.
For columns of type Nchar or Nvarchar, and columns with SUNI attribute, the only valid comparison is EQ or NE *SQLNULL. Other Select/Omit conditions are not supported.