Sql 语法练习

---------------------查询练习使用的数据库和表-------------------
--创建数据库
create database StuInfo
go
--创建班级信息表
use StuInfo
go
create table Class
(
ClassID varchar(10) primary key,  --班级编号
ClassType varchar(10),  --班级类型
ClassDate datetime  --开班日期
)
go
--创建学生信息表
create table Student
(StuID int primary key,
StuName varchar(10),
StuAge int,
StuSex varchar(5),
StuAddress varchar(30),
StuPhone varchar(12),
ClassID varchar(10) foreign key references Class(ClassID)
)
go

--创建科目信息表
create table Subject
(
    SubId int primary key,
    SubName varchar(20)
)
go

--创建成绩信息表
create table Score
(
StuID int foreign key references Student(StuID),
SubId int foreign key references Subject(SubId),
Marks float
)
go

-------插入测试数据
insert into Class values(‘S1T21‘,‘脱产‘,‘2009-03-12‘)
insert into Class values(‘S1T22‘,‘脱产‘,‘2010-04-24‘)
insert into Class values(‘S1T23‘,‘脱产‘,‘2012-05-27‘)
insert into Class values(‘S1T24‘,‘周末‘,‘2010-06-10‘)
insert into Class values(‘S1T25‘,‘脱产‘,‘2008-07-11‘)
insert into Class values(‘S1T26‘,‘脱产‘,‘2009-08-13‘)
insert into Class values(‘S1T27‘,‘周末‘,‘2008-09-17‘)
insert into Class values(‘S1T28‘,‘脱产‘,‘2010-10-25‘)
insert into Class values(‘S1T29‘,‘脱产‘,‘2011-11-21‘)
insert into Class values(‘S1T30‘,‘脱产‘,‘2010-12-22‘)
go

insert into Student values(101,‘张三‘,21,‘男‘,‘湖北襄樊‘,‘13323212322‘,‘S1T27‘)
insert into Student values(102,‘李四‘,23,‘男‘,‘湖北恩施‘,‘13575574545‘,‘S1T23‘)
insert into Student values(103,‘黄英‘,22,‘女‘,‘湖北宜昌‘,‘13326887578‘,‘S1T27‘)
insert into Student values(104,‘月月‘,25,‘女‘,‘湖北荆州‘,‘15829967554‘,‘S1T24‘)
insert into Student values(105,‘王昆‘,26,‘女‘,‘湖北襄樊‘,‘13907800774‘,‘S1T23‘)
insert into Student values(106,‘阳光‘,17,‘男‘,‘湖北恩施‘,‘13134365788‘,‘S1T28‘)
insert into Student values(107,‘石头‘,29,‘女‘,‘湖北宜昌‘,‘13578369966‘,‘S1T26‘)
insert into Student values(108,‘无名‘,23,‘男‘,‘湖北武汉‘,‘18948456676‘,‘S1T28‘)
insert into Student values(109,‘宋江‘,22,‘男‘,‘湖北宜昌‘,‘13657488656‘,‘S1T21‘)
insert into Student values(110,‘李逵‘,24,‘男‘,‘湖北襄樊‘,‘13790788055‘,‘S1T29‘)
insert into Student values(111,‘小丽‘,21,‘男‘,‘湖北恩施‘,‘13153645768‘,‘S1T23‘)
insert into Student values(112,‘王萍‘,26,‘女‘,‘湖北荆州‘,‘15867697990‘,‘S1T28‘)
insert into Student values(113,‘王胜‘,18,‘男‘,‘湖北宜昌‘,‘13346545657‘,‘S1T27‘)
insert into Student values(114,‘彭娟‘,19,‘女‘,‘湖北恩施‘,‘13376879447‘,‘S1T29‘)
go

insert into Subject values(1,‘HTML‘)
insert into Subject values(2,‘JAVA‘)
insert into Subject values(3,‘C#‘)
insert into Subject values(4,‘SQL‘)
go


insert into Score values(101,1,45)
insert into Score values(102,2,65)
insert into Score values(103,3,78)
insert into Score values(105,4,67)
insert into Score values(106,2,89)
insert into Score values(101,2,58)
insert into Score values(102,3,71)
insert into Score values(105,1,80)
insert into Score values(107,2,66)
insert into Score values(112,4,36)
go
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