Trigger updating inserting

A trigger is triggered automatically when an associated DML statement is executed.

trigger updating inserting-37trigger updating inserting-45trigger updating inserting-12

1) Create the 'product' table and 'product_price_history' table Once the above update query is executed, the trigger fires and updates the 'product_price_history' table.

4)If you ROLLBACK the transaction before committing to the database, the data inserted to the table is also rolled back.

In such a situation, when there is a row inserted in table 'abc', trigger A fires and will update table 'xyz'.

When the table 'xyz' is updated, trigger B fires and will insert a row in table 'abc'.

2) Statement level trigger - An event is triggered for each sql statement executed.

The following hierarchy is followed when a trigger is fired. 2) Next BEFORE row level trigger fires, once for each row affected.

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4) Finally the AFTER statement level trigger fires.

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