cum 4
unknown
plain_text
2 years ago
771 B
8
Indexable
create table IDThiSinhDaDuThi ( IdKyThi varchar(255), IdThiSinhDaDuThi varchar(255), PRIMARY KEY (IdKyThi, IdThiSinhDaDuThi)); create table BangTraLoiCuaThiSinh ( IdBangTraLoi varchar(255), IdBaiThi varchar(255), HoVaTenThiSinhTraLoi varchar(255), NgayGioThucHien DATE, ThoiLuongThucHien interval, TongDiemBaiThi real, IdThisinh varchar(255), PRIMARY KEY (IdBangTraLoi)); create table LuaChon ( SoThuTuLuaChon varchar(255), IdCauHoi varchar(255), LuaChonDung varchar(255), Diem real , VanBanLuaChon TEXT, PRIMARY KEY (SoThuTuLuaChon, IdCauHoi)); create table CauTraLoi ( SoThuTuDaLuaChon varchar(255), IdCauHoi varchar(255), IdBangTraLoi varchar(255), PRIMARY KEY (IdCauHoi, IdBangTraLoi));
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