For which of the following are triggers not supported?

For which of the following are triggers not supported?

For which of the following are triggers not supported? Explanation: In MySQL, the triggers are run only after the table modifications like insert, update and delete are run. Triggers are not supported for views. In order to create a trigger, the CREATE TRIGGER statement is used.

Which trigger is executed for each row such that it is affected by the triggering statement?

Row Triggers A row trigger is fired each time the table is affected by the triggering statement. For example, if an UPDATE statement updates multiple rows of a table, a row trigger is fired once for each row affected by the UPDATE statement. If a triggering statement affects no rows, a row trigger is not run.

What is the ABC in the following MySQL statement?

What is abc in the following MySQL statement? Explanation: Column names for a view can be explicitly provided in the ‘CREATE VIEW’ clause itself. It presents the table view with the aliased column names instead of the original column names.

What is the difference between a row level trigger and a statement level trigger?

Row-level triggers execute once for each row in a transaction. Statement-level triggers execute once for each transaction. For example, if a single transaction inserted 500 rows into the Customer table, then a statement-level trigger on that table would only be executed once.

How does trigger work when INSERT statement is fired?

A trigger fired by an INSERT statement will always report that all columns were updated – even if they weren’t. This will update the 1 row in the target table.

What does a trigger do in SQL Server?

Introduction to SQL Triggers A trigger is a piece of code executed automatically in response to a specific event occurred on a table in the database. A trigger is always associated with a particular table. If the table is deleted, all the associated triggers are also deleted automatically.

How does the create or replace trigger statement work?

Basically, the CREATE OR REPLACE TRIGGER creates a new trigger if it does not exist and changes the trigger if it does exist. The CREATE OR REPLACE TRIGGER statement is similar to the CREATE TRIGGER statement as follows:

Can a column list be included in a trigger statement?

When the triggering event is an UPDATE statement, you can include a column list to identify which columns must be updated to fire the trigger. You cannot specify a column list for INSERT and DELETE statements, because they affect entire rows of information.