PHP->Combobox And Gridview

hi,
PHP and Mysql


For example:

my db name is test->table name tb_first->columns sno,name,dept,address,city

Step 1

my tb_first->dept should be bind in combobox

step 2

if i select any value in combobox then regarding all fields should be displayed in gridview

Step 3

After that i want to edit gridview data and it should be update in database also