实验：数据库综合查询.doc

实验：数据库综合查询一、实验目的1. 掌握SELECT语句的基本语法和查询条件表示方法；2. 掌握查询条件种类和表示方法；3. 掌握连接查询的表示及使用；4. 掌握嵌套查询的表示及使用；5. 了解集合查询的表示及使用。二、实验环境已安装SQL Server 2005 企业版的计算机；具有局域网环境,有固定IP;三、实验学时2学时四、实验要求1. 了解SELECT语句的基本语法格式和执行方法；2. 了解连接查询的表示及使用；3. 了解嵌套查询的表示及使用；4. 了解集合查询的表示及使用；5. 完成实验报告；五、实验内容及步骤以实验：数据库单表查询数据为基础，请使用T-SQL 语句实现进行以下操作：1. 查询以DB_开头,且倒数第3个字符为s的课程的详细情况；use stugoselect * from course where cname like DB_%S_2. 查询名字中第2个字为阳的学生姓名和学号及选修的课程号、课程名；use stugoselect sname as 学生姓名,student.sno as 学号,o as 选修课程号,cname as 课程名from student,sc,coursewhere student.sno=sc.sno and o=o and sname like _阳%3. 列出选修了数学或者大学英语的学生学号、姓名、所在院系、选修课程号及成绩；select student.sno as 学号,sname as 姓名,sdept as 所在院系,o as 选修课程号,grade as 成绩from student,sc,coursewhere student.sno=sc.sno and o=oand (cname=数学 or cname=大学英语)4. 查询缺少成绩的所有学生的详细情况；5. 查询与张力(假设姓名唯一)年龄不同的所有学生的信息；select * from studentwhere sage!=(select sage from student where sname=张力)6. 查询所选课程的平均成绩大于张力的平均成绩的学生学号、姓名及平均成绩；select sc.sno as 学号,sname as 姓名,avg(grade) as 平均成绩from student inner join sc on student.sno=sc.snogroup by sc.sno,snamehaving avg(grade)(select avg(grade) from sc inner join student on sc.sno=student.sno where sname=张力)7. 按照“学号，姓名，所在院系，已修学分”的顺序列出学生学分的获得情况。其中已修学分为考试已经及格的课程学分之和；select student.sno as 学号,sname as 姓名,sdept as 所在院系,sum(case when grade60 then ccredit end) as 已修学分from student,sc,coursewhere student.sno=sc.sno and o=ogroup by student.sno,sname,sdept8. 列出只选修一门课程的学生的学号、姓名、院系及成绩；select student.sno as 学号,sname as 姓名,sdept as 所在院系,grade as 成绩from student,scwhere student.sno=sc.sno and student.sno in (select sc.sno from student,sc where student.sno=sc.snogroup by sc.snohaving count(cno)=1)9. 查找选修了至少一门和张力选修课程一样的学生的学号、姓名及课程号；select sc.sno as 学号,sname as 姓名,o as 课程号from student inner join sc on student.sno=sc.snowhere o in (select o from student inner join sc on student.sno=sc.snowhere sname=张力) and sname!=张力10. 只选修“数据库”和“数据结构”两门课程的学生的基本信息；select student.sno as 学号,sname as 姓名,sdept as 所在院系from student,sc,coursewhere student.sno=sc.sno and o=o and student.sno in(select student.sno from student,sc,coursewhere student.sno=sc.sno and o=o and cname=数据库intersectselect student.sno from student,sc,coursewhere student.sno=sc.sno and o=o and cname=数据结构)group by student.sno,sname,ssex,sdepthaving count(o)=211. 至少选修“数据库”或“数据结构”课程的学生的基本信息；12. 列出所有课程被选修的详细情况，包括课程号、课程名、学号、姓名及成绩；select o as 课程号,cname as 课程名,sc.sno as 学号, grade as 成绩from student inner join sc on student.sno=sc.sno right outer join course on o=o13. 查询只被一名学生选修的课程的课程号、课程名；select o as 课程号,cname as 课程名from sc inner join courseon o=owhere o =any(select o from sc group by cno having count(sno)=1)select o as 课程号,cname as 课程名from sc inner join courseon o=ogroup by o,cnamehaving count(sno)=114. 检索所学课程包含学生张向东所学课程的学生学号、姓名；select student.sno,snamefrom student inner join sc on student.sno=sc.snowhere cno=all(select cno from student inner join sc on student.sno=sc.snowhere sname=张向东) and sname!=张向东15. 使用嵌套查询列出选修了“数据结构”课程的学生学号和姓名；select sno,snamefrom studentwhere sno in (select sno from sc where cno in (select cno from course where cname=数据结构)16. 使用嵌套查询查询其它系中年龄小于CS系的某个学生的学生姓名、年龄和院系；select sname,sage,sdeptfrom studentwhere sage19select sno,sname from student where sdept=CSexceptselect sno,sname from student where sage!1921. 使用集合查询列出选修课程1的学生集合与选修课程2的学生集合的交集；select student.sno,sname,ssex,sage