SQL Plus - Help

About

The help command of SQL Plus

To access the help you need a database connection.

because SQL Plus will fired the following SQL in order to retrieve the documentation.

SELECT
  INFO
FROM
  SYSTEM.HELP
WHERE
  UPPER( TOPIC ) LIKE :1
ORDER BY
  TOPIC,
  SEQ;

help index

help command

To install the help on a instance:

@ORACLE_HOME\sqlplus\admin\help\hlpbld.sql helpus.sql;