Question

Что такое триггер? объясните его принцип действия​

Answer 1

Объяснение:

Триггер это то что кокда касаешся он срабатывает как растяжка выполняет то действие которое ему задать

Answer 2

What is a trigger and how does it work?

A trigger is a term that can have different meanings depending on the context. In the field of technology, a trigger is often used to describe an event or condition that initiates a specific action or set of actions. Triggers are commonly used in programming and databases to automate processes or respond to certain events.

In programming, a trigger is a piece of code that is executed automatically when a specific event occurs. This event can be a user action, such as clicking a button or submitting a form, or it can be a system event, such as a timer reaching a certain value or a database record being updated. When the trigger event occurs, the associated code is executed, allowing developers to perform additional actions or implement specific logic.

In the context of databases, a trigger is a special type of stored procedure that is automatically executed when a specific database event occurs, such as an insert, update, or delete operation on a table. Triggers are often used to enforce data integrity rules, perform calculations or validations, or log changes to the database.

The principle of a trigger's action depends on the specific implementation and purpose of the trigger. For example, in programming, a trigger can be used to validate user input, update data in response to an event, or send notifications. In a database, a trigger can be used to enforce referential integrity, update related records, or perform auditing tasks.

It's important to note that the concept of a trigger can vary depending on the programming language, database management system, or technology being used. The specific syntax and functionality of triggers may differ, so it's always recommended to refer to the documentation or resources specific to the technology you are working with.