What is instead of triggers in SQL Server?

An INSTEAD OF trigger is a trigger that allows you to skip an INSERT , DELETE , or UPDATE statement to a table or a view and execute other statements defined in the trigger instead. In other words, an INSTEAD OF trigger skips a DML statement and execute other statements.

Why do we use instead of triggers?

INSTEAD OF triggers provide a transparent way of modifying views that cannot be modified directly through DML statements ( INSERT , UPDATE , and DELETE ). These triggers are called INSTEAD OF triggers because, unlike other types of triggers, Oracle fires the trigger instead of executing the triggering statement.

What happens during Instead of insert trigger?

INSTEAD OF triggers cause their source DML operation to skip and they just execute the code provided inside them. Actual insert, delete or update operation do not occur at all. However they have their associated inserted and deleted tables simulating the DML operation.

What is difference between after trigger and instead of trigger?

Action Query: In the “After Trigger” the table data is affected after the execution of the action query whereas the table data isn’t affected after the execution of an action query in an “Instead of Trigger”. …

Why trigger is used in SQL?

Because a trigger resides in the database and anyone who has the required privilege can use it, a trigger lets you write a set of SQL statements that multiple applications can use. It lets you avoid redundant code when multiple programs need to perform the same database operation.

What can I use instead of SQL?

Top Alternatives to Microsoft SQL

• MySQL.
• Oracle Database.
• IBM Db2.
• PostgreSQL.
• SAP HANA.
• Amazon Relational Database Service (RDS)
• Toad For Oracle.
• SQLite.

What are the after trigger?

An after trigger runs after the corresponding insert, update, or delete changes are applied to the table. The WHEN condition can be used in an SQL trigger to specify a condition. If the condition evaluates to true, the SQL statements in the SQL trigger routine body are run.

What is trigger with 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.