Iden.y column. An iden.y column is a column also known as a field in a database table that is made up of values generated by the database. This is much like an AutoNumber field in Microsoft Access or a sequence in Oracle.. - The IDEN.Y property is different from the SQL-DMO Iden.y property that exposes the row iden.y property of a column. Syntax. IDEN.Y [ seed , increment ] Arguments. seed. Remarks. Iden.y columns can be used for generating key values. Examples. A. Using the IDEN.Y property with CREATE TABLE. See Also.. - An iden.y column has a start value, an increment, a maximum value, a minimum value, and a Iden.y Columns in Oracle Database 12c Release 1 12.1 .. - It simply means the column uses the Iden.y seed, increment function to provide values for a primary key usually . It is also known as .