How to create trigger in MySQL?

How to create trigger in MySQL?

How can we create and use a MySQL trigger?

1. Trigger_name is the name of the trigger which must be put after the CREATE TRIGGER statement.
2. Trigger_time is the time of trigger activation and it can be BEFORE or AFTER.
3. Trigger_event can be INSERT, UPDATE, or DELETE.
4. Table_name is the name of the table.
5. BEGIN…

How to alter trigger in MySQL?

To modify an existing trigger, double-click the node of the trigger to modify, or right-click this node and choose the Alter Trigger command from the context menu. Either of the commands opens the SQL Editor.

How to create a Transact-SQL trigger in SQL Server?

You can design a Transact-SQL trigger to do certain actions based on UPDATE or INSERT modifications to specific columns. Use UPDATE() or COLUMNS_UPDATED in the body of the trigger for this purpose. UPDATE() tests for UPDATE or INSERT attempts on one column. COLUMNS_UPDATED tests for UPDATE or INSERT actions that run on multiple columns.

Why is create trigger statement obscured in SQL Server?

Obscures the text of the CREATE TRIGGER statement. Using WITH ENCRYPTION prevents the trigger from being published as part of SQL Server replication. WITH ENCRYPTION can’t be specified for CLR triggers. Specifies the security context under which the trigger is executed.

Can you define a trigger instead of a DELETE statement?

At most, you can define one INSTEAD OF trigger per INSERT, UPDATE, or DELETE statement on a table or view. You can also define views on views where each view has its own INSTEAD OF trigger. You can’t define INSTEAD OF triggers on updatable views that use WITH CHECK OPTION.

Can a DML trigger be used instead of a SQL statement?

Specifies that the DML trigger launches instead of the triggering SQL statement, thus, overriding the actions of the triggering statements. You can’t specify INSTEAD OF for DDL or logon triggers. At most, you can define one INSTEAD OF trigger per INSERT, UPDATE, or DELETE statement on a table or view.