how to edit saved data on xampp

1//open your table and click on edit and then click update
2
3UPDATE `books` //where books is table name
4SET `bookid`=newvalue,//write what you want to change and new value
5`bookname`=newvalue1//write only those value what you want to change 
6WHERE 
7bookid='oldvalue' //write any value so that xamp found what row want to chnage
8//.........OR..........//
9authorsname='oldvalue' //write any value so that xamp found what row want to chnage
10    
11  
12  //And press Go