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How can we view the list of all triggers in the database?

王林
Release: 2023-09-16 09:37:02
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How can we view the list of all triggers in the database?

With the help of SHOW TRIGGERS statement we can list all the triggers in a specific database. This can be explained with the help of the following example -

Example

mysql> Show Triggers\G
*************************** 1. row ***************************
  Trigger: trigger_before_delete_sample
    Event: DELETE
    Table: sample
Statement: BEGIN

SET @count = if (@count IS NULL, 1, (@count+1));
INSERT INTO sample_rowaffected values (@count);
END

  Timing: BEFORE
 Created: 2017-11-21 12:31:58.70
sql_mode:

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERR
OR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
             Definer: root@localhost
character_set_client: cp850
collation_connection: cp850_general_ci
  Database Collation: latin1_swedish_ci
*************************** 2. row ***************************
  Trigger: before_inser_studentage
    Event: INSERT
    Table: student_age
Statement: IF NEW.age < 0 THEN SET NEW.age = 0;
END IF
  Timing: BEFORE
 Created: 2017-11-21 11:26:15.34
sql_mode:

ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERR
OR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

             Definer: root@localhost
character_set_client: cp850
collation_connection: cp850_general_ci
  Database Collation: latin1_swedish_ci
2 rows in set (0.01 sec)
Copy after login

The above result set gives the list of triggers in the current database. Now, if we want to get the list of triggers in a specific database, then we can use the following statement -

mysql> Show Triggers from tutorials\G
Empty set (0.00 sec)
Copy after login

The above result set shows that there are no triggers in the database named "tutorials".

The above is the detailed content of How can we view the list of all triggers in the database?. For more information, please follow other related articles on the PHP Chinese website!

source:tutorialspoint.com
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