Question: What Is Difference Between Stored Procedure And Trigger?

What is difference between trigger and procedure?

Trigger and Procedure both perform a specified task on their execution.

The fundamental difference between Trigger and Procedure is that the Trigger executes automatically on occurrences of an event whereas, the Procedure is executed when it is explicitly invoked..

What are triggers and stored procedures in SQL?

A stored procedure is a group of SQL statements that is compiled one time, and then can be executed many times. Triggers are named database objects that are implicitly fired when a triggering event occurs. … A trigger is not called directly by a user, where as a stored procedure is directly called by a user.

What is the difference between procedure and stored procedure?

Basic Differences between Stored Procedure and Function in SQL Server. The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters.

What is the advantage of stored procedure over the database triggers?

Advantage of a stored procedure over a database trigger. Stored procedures can accept parameters and can return values. Triggers can neither accept parameters nor return values. A Trigger is dependent on a table and the application has no control to not fire a trigger when not needed.

What are the types of triggers?

Types of Triggers in OracleDML Trigger: It fires when the DML event is specified (INSERT/UPDATE/DELETE)DDL Trigger: It fires when the DDL event is specified (CREATE/ALTER)DATABASE Trigger: It fires when the database event is specified (LOGON/LOGOFF/STARTUP/SHUTDOWN)Mar 8, 2021

What are the after triggers?

What are the after triggers? Explanation: AFTER TRIGGERS can be classified further into three types as: AFTER INSERT Trigger, AFTER UPDATE Trigger, AFTER DELETE Trigger. Explanation: Example : declare @empid int; where empid is the variable.

What are the two types of triggers?

What are the types of triggers?DDL Trigger.DML Trigger.Logon Trigger.Mar 2, 2020

What is the purpose of triggers?

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.

Can we write commit in trigger?

Yes, you can commit inside the trigger. But for this you have to make this trigger transaction to be an Independent transaction from its parent transaction, you can do this by using Pragma. Pragma AUTONOMOUS_TRANSACTION allow you to build the Independent (child) Transaction, started by another.

Which statement is used to remove a trigger?

Use the DROP TRIGGER statement to remove a database trigger from the database. The trigger must be in your own schema or you must have the DROP ANY TRIGGER system privilege. To drop a trigger on DATABASE in another user’s schema, you must also have the ADMINISTER DATABASE TRIGGER system privilege.

How can we specify a row level trigger?

Row-level trigger is identified by the FOR EACH ROW clause in the CREATE TRIGGER command. Statement-level triggers execute once for each transaction. For example, if a single transaction inserted 500 rows into the Customer table, then a statement-level trigger on that table would only be executed once.

What is before trigger?

Before triggers: used to update or validate record values before they’re saved to the database. After triggers: used to access field values that are set by the system (such as a record’s Id or LastModifiedDate field) and to effect changes in other records. The records that fire the after the trigger is read-only.