Pl sql trigger if updating sony vegas main file updating failed operation canceled


Triggers are stored programs, which are automatically executed or fired when some event occurs.

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This article represents the bare minimum you should understand about triggers before you consider writing one.

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

In Oracle, a sequence object (created by CREATE SEQUENCE statement) is used to generate IDs (auto-increment, identity values).

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.

This approach can be thought of as auditing changes to a table.

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