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Hi guys, i have to create a drop-down menu for database data, when i select one data from that then next drop-down menu has to create automatically with related data of the 1st selection.
could anyone please give me some help to do this?

NB: i have 3 tables student(sid, sname), course (cid, cname) , take (sid, cid) so if i select one of the cid then another drop down list has to create automatically with sid who is taking the cid .

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