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Introduction to 1.SQL triggers:

A SQL trigger is a set of SQL statements that are stored in the database directory. Whenever an event associated with a table occurs, an SQL trigger, such as insert, update, or delete, is executed or triggered.

SQL trigger is a special type of stored procedure. This is special because it is not called directly like a stored procedure. The main difference between a trigger and a stored procedure is that when a data modification event is performed on a table, the trigger is automatically called, while the stored procedure must be explicitly called.

It is important to understand the pros and cons of SQL triggers so that you can use them appropriately. In the following sections, we will discuss the pros and cons of using SQL triggers.

Advantages of 2.SQL flip-flop

SQL triggers provide an alternative to checking data integrity.

SQL triggers can catch errors in the business logic in the database layer.

SQL triggers provide another way to run scheduled tasks.

By using SQL triggers, you do not have to wait for the scheduled task to run, because triggers are automatically invoked before or after making changes to the data in the table.

SQL triggers are useful for auditing changes to data in a table.

Disadvantages of 3.SQL trigger

SQL triggers can only provide extended validation and cannot replace all validations. Some simple verification must be done at the application layer. For example, you can use JavaScript or server-side scripting languages (such as JSP,PHP,ASP.NET,Perl, etc.) to validate client-side user input.

Calling and executing SQL triggers from the client application are not visible, so it is difficult to figure out what is happening in the database layer.

SQL triggers may increase the overhead of the database server.

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