What is the alternative for triggers?

Posted on by Muna Meyer

What is the alternative for triggers?

One alternative you might want to look into are computed columns in SQL Server. If that matching is a pretty straightforward one (e.g. extract the character 10 through 14 from the string) or something like that, you could create a computed column to do so automagically – no trigger needed.

Why do we use instead of trigger?

An INSTEAD OF trigger is a trigger that allows you to update data in tables via their view which cannot be modified directly through DML statements. If the view has an INSTEAD OF trigger, it will automatically skip the DML statement and execute other DML statements instead.

What is triggers in MySQL with example?

In MySQL, a trigger is a stored program invoked automatically in response to an event such as insert, update, or delete that occurs in the associated table. For example, you can define a trigger that is invoked automatically before a new row is inserted into a table.

What is trigger in SQL example?

Trigger: A trigger is a stored procedure in database which automatically invokes whenever a special event in the database occurs. For example, a trigger can be invoked when a row is inserted into a specified table or when certain table columns are being updated.

How many types of triggers in SQL Server?

In SQL Server we can create four types of triggers Data Definition Language (DDL) triggers, Data Manipulation Language (DML) triggers, CLR triggers, and Logon triggers.

How do I create a trigger in MySQL?

Within the trigger body,the OLD and NEW keywords enable you to access columns in the rows affected by a trigger

  • In an INSERT trigger,only NEW.col_name can be used.
  • In a UPDATE trigger,you can use OLD.col_name to refer to the columns of a row before it is updated and NEW.col_name to refer to the columns of the row

    • What are the types of trigger?

    DDL Trigger

  • DML Trigger
  • Logon Trigger

    • What is an example of a trigger in SQL?

    – For example, there is a Student table. – You want to send an email from SQL Server whenever a new student record is inserted. – You can create the trigger on the Student table as:

    What are the types of triggers in SQL Server?

    Data Definition Language (DDL) Triggers

  • Data Manipulation Language (DML) Triggers
  • Logon Triggers