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SQL is a powerful language for both querying and updating data in relational databases.Oracle created PL/SQL that extends some limitations of SQL to provide a more comprehensive solution for building mission-critical applications running on Oracle database.Would you like to answer one of these unanswered questions instead?

Before getting started, we highly recommend setting up Oracle database in your system to help you practice and learn PL/SQL effectively.For Example: Let's create a table 'product_check' which we can use to store messages when triggers are fired.Let's create a BEFORE and AFTER statement and row level triggers for the product table.1) Row level trigger - An event is triggered for each row upated, inserted or deleted.2) Statement level trigger - An event is triggered for each sql statement executed.

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