Syntax:
SHOW TRIGGERS [FROM db_name]
    [LIKE 'pattern' | WHERE expr]

SHOW TRIGGERS lists the triggers currently defined for tables in a
database (the default database unless a FROM clause is given). This
statement requires the TRIGGER privilege (prior to MySQL 5.1.22, it
requires the SUPER privilege). The LIKE clause, if present, indicates
which table names to match and causes the statement to display triggers
for those tables. The WHERE clause can be given to select rows using
more general conditions, as discussed in
http://dev.mysql.com/doc/refman/5.1/en/extended-show.html.

For the trigger ins_sum as defined in
http://dev.mysql.com/doc/refman/5.1/en/triggers.html, the output of
this statement is as shown here:

mysql> SHOW TRIGGERS LIKE 'acc%'\G
*************************** 1. row ***************************
             Trigger: ins_sum
               Event: INSERT
               Table: account
           Statement: SET @sum = @sum + NEW.amount
              Timing: BEFORE
             Created: NULL
            sql_mode:
             Definer: myname@localhost
character_set_client: latin1
collation_connection: latin1_swedish_ci
  Database Collation: latin1_swedish_ci

character_set_client is the session value of the character_set_client
system variable when the trigger was created. collation_connection is
the session value of the collation_connection system variable when the
trigger was created. Database Collation is the collation of the
database with which the trigger is associated. These columns were added
in MySQL 5.1.21.

URL: http://dev.mysql.com/doc/refman/5.1/en/show-triggers.html

