Course selection system of educational administration in Henan University - Education and Training Encyclopedia

Course selection system of educational administration in Henan University

My student database is similar to yours, so I made one for you with my watch.

Choice? C.Cno, s.Sname, s.Sno, how many people were selected? From where? Sure? c？

Left? Join? SC？ Open? c.cno=sc.cno？

Left? Join? Student? s？ Open? s.Sno=SC。 Sno

Left? Join? (choose? c.cno，？ Count (s.Sno)? How many students are registered? From where?

Sure? c？ Left? Join? SC？ Open? c.cno=sc.cno？

Left? Join? Student? s？ Open? s.Sno=SC。 Sno？

Group? By who? c.Cno)？ As? t？ Open? t Cno = c Cno

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