ӷࣺ
(Questions -> BigClassID)
С(Questions -> SmallClassID)

ͣ(Questions -> kind)
0ɾ
1ͨ
3ö

ӣ(Questions -> Pith)
1

ͣ(Questions -> solved)
0:δ
1:ѽ

û(Users -> User_Grade)
4վ	<10000
5	<5000
6߼û	<2000
7мû	<1000
8û	<100

Ȩޣ(Users -> popedom)
1Ա
2ܰ
3
8888Ա
