Syntax:
CREATE
    [DEFINER = { user | CURRENT_USER }]
    EVENT
    [IF NOT EXISTS]
    event_name
    ON SCHEDULE schedule
    [ON COMPLETION [NOT] PRESERVE]
    [ENABLE | DISABLE | DISABLE ON SLAVE]
    [COMMENT 'comment']
    DO event_body;

schedule:
    AT timestamp [+ INTERVAL interval] ...
  | EVERY interval
    [STARTS timestamp [+ INTERVAL interval] ...]
    [ENDS timestamp [+ INTERVAL interval] ...]

interval:
    quantity {YEAR | QUARTER | MONTH | DAY | HOUR | MINUTE |
              WEEK | SECOND | YEAR_MONTH | DAY_HOUR | DAY_MINUTE |
              DAY_SECOND | HOUR_MINUTE | HOUR_SECOND | MINUTE_SECOND}

This statement creates and schedules a new event. The event will not
run unless the Event Scheduler is enabled. For information about
checking Event Scheduler status and enabling it if necessary, see
http://dev.mysql.com/doc/refman/5.1/en/events-configuration.html.

CREATE EVENT requires the EVENT privilege for the schema in which the
event is to be created. It might also require the SUPER privilege,
depending on the DEFINER value, as described later in this section.

The minimum requirements for a valid CREATE EVENT statement are as
follows:

o The keywords CREATE EVENT plus an event name, which uniquely
  identifies the event within a database schema. (Prior to MySQL
  5.1.12, the event name needed to be unique only among events created
  by the same user within a schema.)

o An ON SCHEDULE clause, which determines when and how often the event
  executes.

o A DO clause, which contains the SQL statement to be executed by an
  event.

This is an example of a minimal CREATE EVENT statement:

CREATE EVENT myevent
    ON SCHEDULE AT CURRENT_TIMESTAMP + INTERVAL 1 HOUR
    DO
      UPDATE myschema.mytable SET mycol = mycol + 1;

The previous statement creates an event named myevent. This event
executes once---one hour following its creation---by running an SQL
statement that increments the value of the myschema.mytable table's
mycol column by 1.

The event_name must be a valid MySQL identifier with a maximum length
of 64 characters. Event names are not case sensitive, so you cannot
have two events named myevent and MyEvent in the same schema. In
general, the rules governing event names are the same as those for
names of stored routines. See
http://dev.mysql.com/doc/refman/5.1/en/identifiers.html.

An event is associated with a schema. If no schema is indicated as part
of event_name, the default (current) schema is assumed. To create an
event in a specific schema, qualify the event name with a schema using
schema_name.event_name syntax.

URL: http://dev.mysql.com/doc/refman/5.1/en/create-event.html

