Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. I'm trying to write an update trigger that will only update a password when a new password is set in the update statement but I'm having a terrible time trying to nail down the syntax. This should be a no-brainer but I'm just not finding the solution. If the password field already encrypted is being sent back in the update to mySQL, then it will not be null or blank, and MySQL will attempt to redo the Password function on it. To detect this, use this code instead.
MySQL trigger to insert row into another table?
Database triggers are named database objects that are maintained within a database and are activated when data within a table is modified. You can use triggers to bring a level of power and security to the data within the tables. You can use triggers to provide control over access to specific data, the ability to perform specific logging, or auditing of the data itself. When a trigger fails, MySQL rolls back the transaction containing the statement that causes the trigger to fire. MySQL handles errors during trigger execution as follows:. For non-transactional tables, such rollback cannot be done. As a result, although the statement fails, any changes performed prior to the point of the error remain in effect.
What is a MySQL Trigger and how to add Database Triggers in phpMyAdmin?
Standard usage of a MySQL database trigger involves performing a check whenever a piece of content is inserted inside a table or a re-calculation of a value associated with a table update. This tutorial will explain how to create a database trigger using the phpMyAdmin service in your cPanel. Let us get started! Once logged in, please navigate to the " Database " section and click on the " phpMyAdmin " icon. In the left sidebar, you will see a list of all your databases.
It is a special type of stored procedure that is invoked automatically in response to an event. A trigger is called a special procedure because it cannot be called directly like a stored procedure. The main difference between the trigger and procedure is that a trigger is called automatically when a data modification event is made against a table. In contrast, a stored procedure must be called explicitly. Generally, triggers are of two types according to the SQL standard: row-level triggers and statement-level triggers.