1、Student(S#,Sname,Sage,Ssex,Sdept, sselnum 學(xué)生表S5Course(C#,Cname,T#,score 課程表SC(S#,C#,grade 成績(jī)表s1T eacher(T#,Tname 教師表創(chuàng)建存儲(chǔ)過(guò)程,實(shí)現(xiàn)以下操作:1、統(tǒng)計(jì)每一個(gè)學(xué)生的平均成績(jī),要求顯示學(xué)生姓名和平均成績(jī).If exists(select name from sysobjects where name=p1 and type=pDrop pro p1Create procedure p1asSelect sname,avg(gradeFrom sc,studentWhere sc.s

2、#=student.s#Group by s#2、統(tǒng)計(jì)學(xué)生所選課程所得的總學(xué)分,要求顯示系科名,學(xué)號(hào),姓名和總學(xué)分.Create procedure p2asSelect student.S#,Sname,Sage,Sdept,sum(scoreFrom sc,course,studentWhere sc.c#=c.c# and student.s#=sc.s#Group by s#3、建立一存儲(chǔ)過(guò)程,用戶輸入學(xué)生姓名,學(xué)號(hào),如果student表中存在此項(xiàng),則刪除后再插入,若不存在此學(xué)生,則直接插入該記錄.Create procedure p3no char(8,name char(10asb

3、eginif exists(select * from student where s#=no and sname=namebegindelete from student where s#=no and sname=nameinsert into student(S#,Sname values(no,nameendelseinsert into student(S#,Sname values(no,nameend4、根據(jù)用戶鍵入的學(xué)生姓名,查詢學(xué)生的年齡Create procedure p4name char(10asselect sage from student where sname=

4、na me5、根據(jù)用戶鍵入的學(xué)生學(xué)號(hào)和課程號(hào),查詢學(xué)生的成績(jī)Create procedure p5no char(8,cno char(4asselect grade from sc where s#=no and c#=cno6、建立一存儲(chǔ)過(guò)程,使用戶輸入系別,查詢?cè)撓祵W(xué)生選擇各課程的情況.(模糊查詢列出系別,課程號(hào)以及對(duì)應(yīng)的人數(shù),并按系別排序.【Sel_Course】Create procedure p6de char(10asSelect sdept,sc.c#,count(sc.c#From student,sc,Where student.s#=sc.s# and sdept=dGr

5、opu by sc.c#Order by sc.c#7、建立一存儲(chǔ)過(guò)程,使用戶輸入課程名時(shí),列出該課程名,對(duì)應(yīng)的課程號(hào),選擇該課程的學(xué)生總?cè)藬?shù),平均分【Sel_Stu】Create procedure p7cn char(10asSelect sc.c#,cname,count(s#,avg(gradeFrom course,scWhere course.c#=sc.c# and cname=cn創(chuàng)建觸發(fā)器,實(shí)現(xiàn)以下作用:1、創(chuàng)建一個(gè)Insert觸發(fā)器,功能是當(dāng)在sc上插入一行數(shù)據(jù)時(shí),自動(dòng)使得student表對(duì)應(yīng)學(xué)號(hào)上的sselnum字段的值加1Create trigger t1 on sc

6、for insertasupdate studentset sselnum=sselnum+1where s#=(select s# from inserted2、創(chuàng)建一個(gè)Insert觸發(fā)器,功能是當(dāng)在sc上插入數(shù)據(jù)時(shí),自動(dòng)更新student表對(duì)應(yīng)學(xué)號(hào)上的sselnum字段,應(yīng)考慮成批修改數(shù)據(jù)的情況.3、建立一觸發(fā)器,當(dāng)刪除student表中某學(xué)生記錄時(shí),同時(shí)刪除sc表中所有該學(xué)生的選課記錄.Create trigger t3 on student for deleteAsDelete from scWhere s#=( select s# from deleted4、使用IF UPDA TE(保留字,實(shí)現(xiàn)當(dāng)修改Student表中的sno屬性時(shí),sc表中相應(yīng)的sno也要修改Deleted insertedCreate trigger t4