Create Trigger in SQL

Create Trigger in SQL : Suppose we have 2 tables. one is main table (AR_ServiceXUser ) and other table is backup of that table (AR_ServiceXUserAudit) if any data is update in main table then the old data of main table should transfer to backup table

CREATE TRIGGER tg_AR_ServiceXUser  --Name of Table
   ON  AR_ServiceXUser  --Main Table
   FOR UPDATE  
AS   
BEGIN  
 -- SET NOCOUNT ON added to prevent extra result sets from  
 -- interfering with SELECT statements.  
 SET NOCOUNT ON;  
   
 INSERT INTO [AR_ServiceXUserAudit]  --Audit Table to take backup on any updation of data
           ([ServiceUserID]  
           ,[ServiceID]  
           ,[UserID]  
           ,[DeliveryStatusID]  
           ,[OrderDate]  
           ,[TransactionID]  
           ,[CenterID]  
          )  
      
  
SELECT [ID]  
      ,[ServiceID]  
      ,[UserID]  
      ,[DeliveryStatusID]  
      ,[OrderDate]  
      ,[TransactionID]  
      ,[CenterID]  
  FROM DELETED  
   
   
 SET NOCOUNT OFF;  
END