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  • sql练习-Student-Teacher-Course建表

    #学生表
    create table Student(
    sid varchar(10),
    sname varchar(10),
    sage datetime,
    ssex varchar(10)
    );
    
    #教师表
    create table Teacher( 
    tid varchar(10),
    tname varchar(10)
    );
    
    #科目表
    create table Course(
    cid varchar(10),
    cname varchar(10),
    tid varchar(10)
    );
    
    #成绩表
    create table Score( 
    sid varchar(10),
    cid varchar(10),
    score varchar(18.1)
    );
    insert into Student values('01' , '赵雷' , '1990-01-01' , '');
    insert into Student values('02' , '钱电' , '1990-12-21' , '');
    insert into Student values('03' , '孙风' , '1990-05-20' , '');
    insert into Student values('04' , '李云' , '1990-08-06' , '');
    insert into Student values('05' , '周梅' , '1991-12-01' , '');
    insert into Student values('06' , '吴兰' , '1992-03-01' , '');
    insert into Student values('07' , '郑竹' , '1989-07-01' , '');
    insert into Student values('09' , '张三' , '2017-12-20' , '');
    insert into Student values('10' , '李四' , '2017-12-25' , '');
    insert into Student values('11' , '李四' , '2017-12-30' , '');
    insert into Student values('12' , '赵六' , '2017-01-01' , '');
    insert into Student values('13' , '孙七' , '2018-01-01' , '');
    
    insert into Course values('01' , '语文' , '02'); 
    insert into Course values('02' , '数学' , '01'); 
    insert into Course values('03' , '英语' , '03');
    
    insert into Teacher values('01' , '张三');
    insert into Teacher values('02' , '李四'); 
    insert into Teacher values('03' , '王五'); 
    
    insert into Score values('01' , '01' , 80); 
    insert into Score values('01' , '02' , 90); 
    insert into Score values('01' , '03' , 99); 
    insert into Score values('02' , '01' , 70); 
    insert into Score values('02' , '02' , 60); 
    insert into Score values('02' , '03' , 80); 
    insert into Score values('03' , '01' , 80); 
    insert into Score values('03' , '02' , 80); 
    insert into Score values('03' , '03' , 80); 
    insert into Score values('04' , '01' , 50); 
    insert into Score values('04' , '02' , 30); 
    insert into Score values('04' , '03' , 20); 
    insert into Score values('05' , '01' , 76); 
    insert into Score values('05' , '02' , 87); 
    insert into Score values('06' , '01' , 31); 
    insert into Score values('06' , '03' , 34); 
    insert into Score values('07' , '02' , 89); 
    insert into Score values('07' , '03' , 98);
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  • 原文地址:https://www.cnblogs.com/HelloM/p/13569708.html
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