Choose your database:
AnySQL
MySQL
MS SQL Server
PostgreSQL
SQLite
Firebird
Oracle
SQL Anywhere
DB2
MaxDB

Subscribe to our news:
Partners
Testimonials
Torstein Krogh: "Some time ago, I tested all available tools on the market for maintaining MySQL and MySQL Maestro came up on top. My opinion is that MySQL should offer it as a free tool for all paying customers! They have nothing today, and doing MySQL DOS commands is not getting any new customers".
Charles Richardson: "In particular, the graphical schema design module is wonderfully smooth and responsive".

More

Add your opinion

Customers
Download Buy

SQL Maestro for MySQL online help

Prev Return to chapter overview Next

Triggers

A trigger is a specification that the database should automatically execute a particular function whenever a certain type of operation is performed. A trigger can be defined to execute before or after an INSERT, UPDATE, or DELETE operation, either once per modified row, or once per SQL statement.Triggers are actually supported since MySQL version 5.0.10 If a trigger event occurs, the trigger fires.

 

 

Triggers are created within Create Trigger Wizard. In order to run the wizard you should either

 

•open the table in Table Editor and the Triggers tab there;
•press the Insert key or select the Add New Trigger... item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar)

or

•select the table in the explorer tree and use the Create New Trigger... popup menu item

or

•select the table Triggers node or any trigger within the table in the explorer tree and use the Add New Trigger... popup menu item.

 

 

Triggers are edited within the Trigger Editor dialog window. In order to open the dialog you should either

 

•open the table in Table Editor and the Triggers tab there;
•press the Enter key or select the Edit Trigger item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar)

or

•select the trigger to edit in the explorer tree and use the Edit Trigger popup menu item.

       

You can change the name of the trigger using the Rename Trigger dialog. To open the dialog you should either

 

•select the trigger to rename in the explorer tree;
•select the Rename Trigger item from the popup menu

or

•open the table in Table Editor and the Triggers tab there;
•select the trigger to rename;
•select the Rename Trigger item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar).

 

 

 

To drop the trigger:

 

•select the trigger to drop in the explorer tree;
•select the Drop Trigger item from the popup menu

or

•open the table in Table Editor and the Triggers tab there;
•press the Delete key or select the Drop Trigger item from the popup menu (alternatively, you may use the corresponding link of the Navigation Bar)

 

and confirm dropping in the dialog window.

 


Prev Return to chapter overview Next