How to document Oracle database? I'm new to Oracle databases. I have used to SQL Server and the description fields (MS_Description) for tables and columns for documentation purposes. Is there an equivalent for Oracle? What is the best practice for documenting Oracle database?
In Oracle, you would use the COMMENT command to:


  [...] add to the data dictionary a comment about a table or table
  column, view, materialized view, operator, indextype, mining model, or
  edition.


Most tools (PL/SQL Developer, Toad...) will display these comments in appropriate fields when you browse the database schema.

The comments can be queried directly with the *COMMENTS dictionary views, such as ALL_TAB_COMMENTS.