Characteristics of Statement-Level Triggers

  • It can only be executed once per triggering DML statement.
  • For each row, clause is not present here.
  • It usually differs from row-level triggers that iterate per row.
  • Access to : old and: new pseudo records might be limited based on timing (Before or After).

PL/SQL Statement level Triggers

Statement-level triggers in Oracle databases execute actions for each transaction, responding to various database events like DML and DDL statements, system events, and user interactions. They act as programmed responses to specific table events, enhancing database management and automation.

Stored as named PL/SQL blocks, triggers execute automatically upon occurrence of a predefined event, crucial for efficient database operation.

In this article, we will cover PL/SQL Statement level Triggers syntax, their importance, characteristics, common use cases, and examples, illustrating their role in Oracle database management.

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PL/SQL Statement Level Triggers

Statement-level triggers are said to be specialized PL/SQL code blocks that execute once per triggering DML statement like, Insert, Update, and Delete on any table. How about a glimpse of its structure?...

Importance of Statement-Level Triggers

*NOTE: Assume that you have created a database for some customers with constraints like, orders, sales etc....

Characteristics of Statement-Level Triggers

It can only be executed once per triggering DML statement. For each row, clause is not present here. It usually differs from row-level triggers that iterate per row. Access to : old and: new pseudo records might be limited based on timing (Before or After)....

Common Use Cases

It reduces code duplicacy and improves code maintainability. It can log information about database modifications like user, timestamp, and table affected. It tends to validate data and enforce rules beyond database constraints. It can even add extra security checks before or after DML statements....

Example of PL/SQL Statement Level Triggers

Let us assume the same example. Suppose there exists a table named customers....

Conclusion

In Conclusion, PL/SQL Statement level Triggers are essential tools in Oracle database management, automating actions in response to specified events. Their syntax, importance, characteristics, and common use cases demonstrate their critical role in maintaining data integrity and enhancing security. Understanding and utilizing these triggers streamline database operations, ensuring efficiency and reliability in handling transactions and events....

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