课程表:
insert into Course values('1','数据库','4');
insert into Course values('2','操作系统','3');
insert into Course values('3','计算方法','4');
insert into Course values('4','计算机导论','3');
insert into Course values('5','单片机','4');
insert into Course values('6','图像处理','2');
insert into Course values('7','JAVA','2');
选课表:
insert into sc values('950010006','1',45);
insert into sc values('950010007','4',85);
insert into sc values('950010001','1',76);
insert into sc values('950010001','2',58);
insert into sc values('950010002','3',87);
insert into sc values('950010003','2',95);
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