求数据库题答案!答:--新增数据 insert into student(stuid,stuname,stusex,spec) values('100001','李珍珍',null,'英语');insert into student(stuid,stuname,stusex,spec) values('100002','蔡准','男','计算机');commit;insert into course(couid,couname,credit) values(1,'数据库原理与应用',4.5);commit;...
求下面《数据库原理》题目的正确解答答:表1 students(stuNo,name,sex,birthdate,xi,birthplace)表2 course(courseNo,name,credit)表3 elective(stuNo,courseNo,score)1、求李小波所在的系:select xi from students where name='李小波'2、求李小波所修的全部课程:select c.name from students s,course c,elective e where s.stuno...