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Excerpts from this Manual SHOW TRIGGERS Syntax

    [{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 for databases and tables for which you have the TRIGGER privilege. The LIKE clause, if present, indicates which table names (not trigger 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 Section 21.32, “Extensions to SHOW Statements”.

For the ins_sum trigger defined in Section 20.3, “Using Triggers”, the output of SHOW TRIGGERS 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
             Definer: me@localhost
character_set_client: utf8
collation_connection: utf8_general_ci
  Database Collation: latin1_swedish_ci

SHOW TRIGGERS output has these columns:

  • Trigger

    The name of the trigger.

  • Event

    The trigger event. This is the type of operation on the associated table for which the trigger activates. The value is INSERT (a row was inserted), DELETE (a row was deleted), or UPDATE (a row was modified).

  • Table

    The table for which the trigger is defined.

  • Statement

    The trigger body; that is, the statement executed when the trigger activates.

  • Timing

    Whether the trigger activates before or after the triggering event. The value is BEFORE or AFTER.

  • Created

    The value of this column is always NULL.

  • sql_mode

    The SQL mode in effect when the trigger was created, and under which the trigger executes. For the permitted values, see Section 5.1.10, “Server SQL Modes”.

  • Definer

    The account of the user who created the trigger, in 'user_name'@'host_name' format.

  • character_set_client

    The session value of the character_set_client system variable when the trigger was created.

  • collation_connection

    The session value of the collation_connection system variable when the trigger was created.

  • Database Collation

    The collation of the database with which the trigger is associated.

Trigger information is also available from the INFORMATION_SCHEMA TRIGGERS table. See Section 21.26, “The INFORMATION_SCHEMA TRIGGERS Table”.

User Comments
User comments in this section are, as the name implies, provided by MySQL users. The MySQL documentation team is not responsible for, nor do they endorse, any of the information provided here.
  Posted by Jonathan Nicol on April 30, 2013
"The WHERE clause can be given to select rows using more general conditions, as discussed in Section 20.31, “Extensions to SHOW Statements”. "

You must use backticks on the filtered column name:

WRONG: show triggers where 'Trigger' like 'a%'\G
RIGHT: show triggers where `Trigger` like 'a%'\G
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