need help in update query.

Question

currently am working on student management system. i am adding student details along with what class and section they are studing by selecting class and section combobox control. The added student details are stored into respective class with section table like tbl_Nursery_A. and tbl_Nursery_B. The same manner there will be tables upto 10th class. when adding student details there may chances that we may choose wrong section and class. 

How can i update student correct studing details to the tables in EditStudentForm ?.