Syntax:
SHOW TRIGGERS [{FROM | IN} 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 returns results only if you have the SUPER privilege. It was
implemented in MySQL 5.0.10. 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/5.0/en/extended-show.html.

For the trigger ins_sum as defined in
http://dev.mysql.com/doc/refman/5.0/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

URL: http://dev.mysql.com/doc/refman/5.0/en/show-triggers.html

