Lack of Comments Makes Database Documentation Useless
Piotr Kononow
Too often, developers produce database documentation containing just a schema information - table and column names, without any descriptions. See a few examples.
Database Comments Articles
How to Check if Your Database Has Comments
Most popular database engines provide option to provide descriptions for schema elements. This article shows how to check if your database uses them.
What You Can Comment In Oracle Database
Overview of capabilities of commenting objects in Oracle database.