--创建学生视图if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[v_stu]') and OBJECTPROPERTY(id, N'IsView') = 1)drop view [dbo].[v_stu]gocreate view v_stuasselect sid, sname, ssexy, sbdate, Datediff(year, sbdate, getdate()) as sage, stele,ugrade.gid, gname, gyear,udept.did, dname, daddr, dtele, demail,uteacher.tid, tname, tsexy, tbdate, tfield, tprof, tele, qq, email, msnfrom ustudent, ugrade, udept, uteacherwhere ustudent.gid=ugrade.gid and ugrade.did=udept.did and ugrade.tid=uteacher.tid--创建选修课程视图if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[v_sc]') and OBJECTPROPERTY(id, N'IsView') = 1)drop view [dbo].[v_sc]gocreate view v_scasselect ustudent.sname, usc.*, cname, credit, pcid, chour, cattr, cnumfrom ustudent, usc, ucoursewhere ustudent.sid=usc.sid and usc.cid=ucourse.cid--1、显示所有学生的详细信息，包括学号、姓名、性别、年龄、班级名称，入学年份select sid, sname, ssexy, sage, gname, gyearfrom v_stu--2、显示信息科学与技术系同学的名单，包括学号、姓名、性别、年龄、班级名称、入学年份select sid, sname, ssexy, sage, gname, gyearfrom v_stuwhere dname='信息科学与技术系'--3、显示选修了“数据库”的所有同学的学号、姓名select sid, snamefrom v_scwhere cname='数据库'--4、显示白云同学的班主任老师的姓名、联系电话select tname, telefrom v_stuwhere sname='白云'--5、显示白云同学所在院系的名称、办公地点与联系电话select dname, daddr, dtelefrom v_stuwhere sname='白云'--6、统计计算机科学与技术系每个同学已经修完的学分，显示学号、姓名、学分总数select v_stu.sid, v_stu.sname, sum(v_sc.credit)from v_stu, v_scwhere v_stu.sid=v_sc.sid and v_stu.dname='计算机科学与技术系'group by v_stu.sid, v_stu.sname--7、显示李山同学已修课程及期末成绩select sid, sname, cname, score2from v_scwhere sname='李山'--8、显示计算机科学与技术系、信息科学与技术系的班级名称、入学年份、班导名称与联系电话select distinct gname, gyear, tname, telefrom v_stuwhere dname in ('计算机科学与技术系', '信息科学与技术系')--9、显示2006年入学的同学的学号、姓名、班级名称select sid, sname, gnamefrom v_stuwhere gyear='2006'--10、显示已修数据库的同学的学号、姓名及期末成绩select sid, sname, score2from v_scwhere cname='数据库'--11、显示平均成绩75分以上的课程名称与平均成绩select cname, cast(avg(score2) as dec(5,2)) as '平均成绩'from v_scgroup by cid, cnamehaving avg(score2)>75--12、显示平均成绩80分以上同学的学号、姓名与平均成绩select sid, sname, cast(avg(score2) as dec(5,2)) as '平均成绩'from v_scgroup by sid, snamehaving avg(score2)>80--13、显示一周课时数为6节及以上的教师的姓名与研究领域select tname, tfieldfrom uteacherwhere tid in (select tidfrom ujobtablegroup by tidhaving sum(len(timeseg))>=6)--14、按照班级统计期末平均成绩，显示班级名称与平均成绩select gname, cast(avg(score2) as dec(5,2)) as '平均成绩'from v_stu, uscwhere v_stu.sid=usc.sidgroup by gid, gname--15、按照学期统计计算机科学与技术系的期末平均成绩select term, cast(avg(score2) as dec(5,2)) as '平均成绩'from v_stu, uscwhere v_stu.sid=usc.sid and v_stu.dname='计算机科学与技术系' group by term--16、统计每个院系一周的课时数，显示院系名称与课时数select dname, sum(len(timeseg))from ujobtable, uteacher, udeptwhere ujobtable.tid=uteacher.tid and uteacher.did=udept.didgroup by udept.dname--17、显示没有选修任何课程的学生学号、姓名、班级名称select sid, sname, gnamefrom v_stuwhere sid not in (select sid from usc)--18、显示上过李飞老师的课的学生的学号、姓名与联系电话select sid, sname, stelefrom ustudentwhere gid in (select gidfrom ujobtable, uteacherwhere ujobtable.tid=uteacher.tid and uteacher.tname='李飞')--19、显示一周6节课及以上的课程名称、学分select cname, creditfrom ucoursewhere cid in (select cidfrom ujobtablegroup by cidhaving sum(len(timeseg))>=6)--20、显示一周6节课及以上班级名称select gnamefrom ugradewhere gid in (select gidfrom ujobtablegroup by gidhaving sum(len(timeseg))>=6)--21、查询周四上午第3节有课的同学的学号、姓名与班级名称select sid, sname, gnamefrom v_stu, ujobtablewhere v_stu.gid=ujobtable.gid and week='4' and timeseg like '%3%'--22、显示没有不及格课程的班级的名称select distinct gnamefrom ugrade, ustudent, uscwhere ugrade.gid=ustudent.gidand ustudent.sid=usc.sidand ustudent.gid not in (select distinct gidfrom ustudent, uscwhere ustudent.sid=usc.sid and usc.score2<60)--23、显示已修数据库的同学的信息，包括学号、姓名、班级名称select v_stu.sid, v_stu.sname, gnamefrom v_stu, v_scwhere v_stu.sid=v_sc.sid and v_ame='数据库'--24、显示不及格1门以上的同学学号、姓名、门数select sid, sname, count(cid)from v_scwhere score2<60group by sid, snamehaving count(cid)>1--25、统计每个班级的最高分，显示班级名称、成绩select gname, max(score2) as '最高分'from v_sc, ustudent, ugradewhere v_sc.sid=ustudent.sid and ustudent.gid=ugrade.gidgroup by ugrade.gid, gname--26、显示一周8节课及以上的学生的名单，显示学号、姓名、班级select distinct sid, sname, gnamefrom v_stu, ujobtablewhere v_stu.gid in (select gidfrom ujobtablegroup by gidhaving sum(len(timeseg))>8)--27、显示计算机科学与技术1班一周上课的时间、地点，课程名称select week, timeseg, room, cnamefrom ujobtable, ugrade, ucoursewhere ujobtable.gid=ugrade.gid and ujobtable.cid=ucourse.cid and ugrade.gname='计算机科学与技术1班'--28、统计教授上课的课时数，显示姓名、课时数select tname, sum(len(timeseg))from ujobtable, uteacherwhere ujobtable.tid=uteacher.tid and uteacher.tprof='教授'group by uteacher.tid, uteacher.tname--29、显示没有班导师的班级名称、院系名称select gname, dnamefrom ugrade, udeptwhere ugrade.did=udept.did and ugrade.tid is null--30、显示指导两个班级以上的班导的姓名、所指导的班级名称select tname, gnamefrom uteacher, ugradewhere uteacher.tid=ugrade.tidand uteacher.tid in (select uteacher.tidfrom uteacher, ugradewhere uteacher.tid=ugrade.tidgroup by uteacher.tidhaving count(ugrade.gid)>1)。