HELP
HELP [{'command | reserve_word'}]You can use this statement to access built-in documentation.
Enter HELP alone to display a list of MySQL
commands for which you may display documentation. Typing HELP
contents displays a table of contents for this internal
documentation. For quick reference, you can also give an SQL statement
or clause:
HELP SELECT;
This displays the syntax for the SELECT
statement along with a brief description of some of the clauses.
Similarly, entering HELP SHOW gives you a list of
SQL statements beginning with SHOW.