Instructor
Ashish Thakur Replied on 12/01/2019
when we apply "where" clause with select command for eg: let me have the records of employees of any company and i want to find the id of all those persons whose job profile is 'IT-PROG' ---> so my query will first make some changes, then it will present the result. hence the data is being modified for the run time only but the changes are happening to provide the results