Start Updating clause used in instead

Updating clause used in instead

1) BEFORE UPDATE, Statement Level: This trigger will insert a record into the table 'product_check' before a sql update statement is executed, at the statement level.

The above rules apply similarly for INSERT and DELETE statements.

If you omit the WHERE clause, the same modification will be applied to every row in the table.

We will use the employees and dependents table to demonstrate the UPDATE statement.

This is an undesirable situation where more than one trigger enter into an infinite loop.

while creating a trigger we should ensure the such a situtation does not exist. 1) The INSERT Trigger, trigger A on table 'abc' issues an UPDATE on table 'xyz'.

For Example: The price of a product changes constantly.

It is important to maintain the history of the prices of the products.

The UPDATE statement affects one or more rows in a table based on the condition in the WHERE clause.