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A Trigger is executed when you insert, update or delete data in a Table specified in the Trigger. Create the Trigger: IF EXISTS (SELECT name Inside the FROM sysobjects WHERE name - 'CalcAvgGrade' Trigger you can AND type = 'TR') DROP TRIGGER CalgAvgGrade Name of the Trigger use ordinary SQL GO statements, CREATE TRIGGER CalcAvgGrade ON GRADE Specify which Table the Trigger shall work on Specify what kind of operations the Trigger create variables, FOR UPDATE, INSERT, DELETE etc. AS DECLARE shall act on @studentId int, @AvgGrade float Internal/Local Variables select @student Id = StudentId from INSERTED SQL Code (The "body" of the Trigger) select @AvgGrade = AVG (Grade)sfom GRADE where studentId = @studentId update STUDENT set Totalerade = @AvgGrade where studentId = @studentId GO Note! "INSERTED" is a temporarily table containing the latest inserted data, and it is very handy to use inside a trigger

A Trigger is executed when you insert, update or delete data in a Table specified in the Trigger. Create the Trigger: IF EXISTS (SELECT name Inside the FROM sysobjects WHERE name - 'CalcAvgGrade' Trigger you can AND type = 'TR') DROP TRIGGER CalgAvgGrade Name of the Trigger use ordinary SQL GO statements, CREATE TRIGGER CalcAvgGrade ON GRADE Specify which Table the Trigger shall work on Specify what kind of operations the Trigger create variables, FOR UPDATE, INSERT, DELETE etc. AS DECLARE shall act on @studentId int, @AvgGrade float Internal/Local Variables select @student Id = StudentId from INSERTED SQL Code (The "body" of the Trigger) select @AvgGrade = AVG (Grade)sfom GRADE where studentId = @studentId update STUDENT set Totalerade = @AvgGrade where studentId = @studentId GO Note! "INSERTED" is a temporarily table containing the latest inserted data, and it is very handy to use inside a trigger

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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A Trigger is executed when you insert, update or delete data in a Table specified in the Trigger. Create the Trigger: IF EXISTS (SELECT name Inside the FROM WHERE sysobjects name - 'CalcAvgGrade' type = 'TR') Trigger you can use ordinary SQL AND DROP TRIGGER CalgAvgGrade Name of the Trigger GO statements, CREATE TRIGGER CalcAvgGrade ON GRADE Specify which Table the create variables, FOR UPDATE, INSERT, DELETE Trigger shall work on etc. AS Specify what kind of operations the Trigger shall act on DECLARE @studentId int, @AvgGrade float Internal/Local Variables select @Student Id = StudentId from INSERTED SQL Code (The "body" of the Trigger) select @AvgGrade = AVG (Grade) om GRADE where StudentId = @studentId update STUDENT set TotalGrade = @AvgGrade where StudentId = @studentId GO Note! "INSERTED" is a temporarily table containing the latest inserted data, and it is very handy to use inside a trigger
Transcribed Image Text:A Trigger is executed when you insert, update or delete data in a Table specified in the Trigger. Create the Trigger: IF EXISTS (SELECT name Inside the FROM WHERE sysobjects name - 'CalcAvgGrade' type = 'TR') Trigger you can use ordinary SQL AND DROP TRIGGER CalgAvgGrade Name of the Trigger GO statements, CREATE TRIGGER CalcAvgGrade ON GRADE Specify which Table the create variables, FOR UPDATE, INSERT, DELETE Trigger shall work on etc. AS Specify what kind of operations the Trigger shall act on DECLARE @studentId int, @AvgGrade float Internal/Local Variables select @Student Id = StudentId from INSERTED SQL Code (The "body" of the Trigger) select @AvgGrade = AVG (Grade) om GRADE where StudentId = @studentId update STUDENT set TotalGrade = @AvgGrade where StudentId = @studentId GO Note! "INSERTED" is a temporarily table containing the latest inserted data, and it is very handy to use inside a trigger
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