How do I delete all triggers?
It is not possible to delete all the triggers in a MySQL database using one SQL statement. But with the following SQL code you can build the list of all the ‘DROP TRIGGER’ statements (replace with your schema name, e.g. your database name): — set `group_concat_max_len` SET @@session.
Which of the following is used to delete a trigger from the system?
Use the DROP TRIGGER statement to remove a database trigger from the database. The trigger must be in your own schema or you must have the DROP ANY TRIGGER system privilege.
Are there any operations that don’t invoke triggers?
Some operations don’t invoke triggers. Triggers are invoked for data manipulation language (DML) operations that the Java application server initiates or processes. Therefore, some system bulk operations don’t invoke triggers.
How does truncate not run on delete trigger?
If there are any FOREIGN KEY constraints that reference the table, InnoDB processes TRUNCATE TABLE by deleting rows one by one, processing the constraints as it proceeds. If the FOREIGN KEY constraint specifies DELETE CASCADE, rows from the child (referenced) table are deleted, and the truncated table becomes empty.
How to create a trigger after delete in SQL?
CREATE TRIGGER trigger_name AFTER DELETE ON table_name FOR EACH ROW trigger_body; Code language: SQL (Structured Query Language) (sql) In this syntax: First, specify the name of the trigger that you want to create in the CREATE TRIGGER clause. Second, use AFTER DELETE clause to specify the time to invoke the trigger.
What’s the best way to disable a trigger?
Disabling a trigger is something that you may need to do at certain times especially when performing admin tasks on a table. The best way to accomplish this is to use the following command to completely disable a trigger. The trigger once disabled will not fire until it is enabled again. To enable the trigger you use the following code: