--建表

--學生表

CREATE TABLE Student(

s_id VARCHAR(20),

s_name VARCHAR(20) NOT NULL DEFAULT '',

s_birth VARCHAR(20) NOT NULL DEFAULT '',

s_sex VARCHAR(10) NOT NULL DEFAULT '',

PRIMARY KEY(s_id)

);

--課程表

CREATE TABLE Course(

c_id VARCHAR(20),

c_name VARCHAR(20) NOT NULL DEFAULT '',

t_id VARCHAR(20) NOT NULL,

PRIMARY KEY(c_id)

);

--教師表

CREATE TABLE Teacher(

t_id VARCHAR(20),

t_name VARCHAR(20) NOT NULL DEFAULT '',

PRIMARY KEY(t_id)

);

--成績表

CREATE TABLE Score(

s_id VARCHAR(20),

c_id VARCHAR(20),

s_score INT(3),

PRIMARY KEY(s_id,c_id)

);

--插入學生表測試數(shù)據(jù)

insert into Student values('01' , '趙雷' , '1990-01-01' , '男');

insert into Student values('02' , '錢電' , '1990-12-21' , '男');

insert into Student values('03' , '孫風' , '1990-05-20' , '男');

insert into Student values('04' , '李云' , '1990-08-06' , '男');

insert into Student values('05' , '周梅' , '1991-12-01' , '女');

insert into Student values('06' , '吳蘭' , '1992-03-01' , '女');

insert into Student values('07' , '鄭竹' , '1989-07-01' , '女');

insert into Student values('08' , '王菊' , '1990-01-20' , '女');

--課程表測試數(shù)據(jù)

insert into Course values('01' , '語文' , '02');

insert into Course values('02' , '數(shù)學' , '01');

insert into Course values('03' , '英語' , '03');

--教師表測試數(shù)據(jù)

insert into Teacher values('01' , '張三');

insert into Teacher values('02' , '李四');

insert into Teacher values('03' , '王五');

--成績表測試數(shù)據(jù)

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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