I am having the table of the following details.
rollno subject standard
reg01 maths III
reg01 physics III
reg01 english III
This reg01 student has registered this courses. He can make changes this registered courses. How can i find the "updation"(or differences) of my table as the previous using php. No changes means ...the master should not get updation. If any changes means, the request should me sented. How to find it this ? Please help me out thanks in advance.