Getting Help Within mysql

If you are working within the mysql command-line client and want to quickly look up a particular command or function, just type help command_or_function_name and press Enter. In modern versions of MySQL, concise information on the command or function name is displayed. To see a list of what help is available, type help contents.

This feature is particularly useful when you are visiting a MySQL server that uses an unfamiliar version of MySQL because it often allows you to get help specific to that version of MySQL.