Syntax:
GRANT
    priv_type [(column_list)]
      [, priv_type [(column_list)]] ...
    ON [object_type] priv_level
    TO user_specification [, user_specification] ...
    [REQUIRE {NONE | tls_option [[AND] tls_option] ...}]
    [WITH {GRANT OPTION | resource_option} ...]

GRANT PROXY ON user_specification
    TO user_specification [, user_specification] ...
    [WITH GRANT OPTION]

object_type: {
    TABLE
  | FUNCTION
  | PROCEDURE
}

priv_level: {
    *
  | *.*
  | db_name.*
  | db_name.tbl_name
  | tbl_name
  | db_name.routine_name
}

user_specification:
    user [ auth_option ]

auth_option: {
    IDENTIFIED BY 'auth_string'
  | IDENTIFIED BY PASSWORD 'hash_string'
  | IDENTIFIED WITH auth_plugin
  | IDENTIFIED WITH auth_plugin AS 'hash_string'
}

tls_option: {
    SSL
  | X509
  | CIPHER 'cipher'
  | ISSUER 'issuer'
  | SUBJECT 'subject'
}

resource_option: {
  | MAX_QUERIES_PER_HOUR count
  | MAX_UPDATES_PER_HOUR count
  | MAX_CONNECTIONS_PER_HOUR count
  | MAX_USER_CONNECTIONS count
}

The GRANT statement grants privileges to MySQL user accounts. GRANT
also serves to specify other account characteristics such as use of
secure connections and limits on access to server resources.

To use GRANT, you must have the GRANT OPTION privilege, and you must
have the privileges that you are granting. When the read_only system
variable is enabled, GRANT additionally requires the SUPER privilege.

The REVOKE statement is related to GRANT and enables administrators to
remove account privileges. See [HELP REVOKE].

Normally, a database administrator first uses CREATE USER to create an
account, then GRANT to define its privileges and characteristics. For
example:

CREATE USER 'jeffrey'@'localhost' IDENTIFIED BY 'mypass';
GRANT ALL ON db1.* TO 'jeffrey'@'localhost';
GRANT SELECT ON db2.invoice TO 'jeffrey'@'localhost';
GRANT USAGE ON *.* TO 'jeffrey'@'localhost' WITH MAX_QUERIES_PER_HOUR 90;

*Note*: Examples shown here include no IDENTIFIED clause. It is assumed
that you establish passwords with CREATE USER at account-creation time
to avoid creating insecure accounts.

If an account named in a GRANT statement does not already exist, GRANT
may create it under the conditions described later in the discussion of
the NO_AUTO_CREATE_USER SQL mode.

From the mysql program, GRANT responds with Query OK, 0 rows affected
when executed successfully. To determine what privileges result from
the operation, use SHOW GRANTS. See [HELP SHOW GRANTS].

URL: http://dev.mysql.com/doc/refman/5.5/en/grant.html

