[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 for databases and tables for which you have the TRIGGER privilege. The LIKE clause, if present, indicates which table names to match (not trigger names) 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 Section 21.31, “Extensions to SHOW Statements”.

For the trigger ins_sum as defined in Section 20.3, “Using Triggers”, the output of this statement is as shown here:

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

SHOW TRIGGERS output has the following columns:

You can also obtain information about trigger objects from INFORMATION_SCHEMA, which contains a TRIGGERS table. See Section 21.25, “The INFORMATION_SCHEMA TRIGGERS Table”.