create table class (
cid int PRIMARY KEY,
caption varchar(32) not null
)
INSERT INTO class VALUES
(1, '三年二班'),
(2, '三年三班'),
(3, '一年二班'),
(4, '二年九班');
CREATE TABLE teacher(
tid int PRIMARY KEY,
tname varchar(32) NOT NULL
)
INSERT INTO teacher VALUES
(1, '张磊老师'),
(2, '李平老师'),
(3, '刘海燕老师'),
(4, '朱云海老师'),
(5, '李杰老师');
CREATE TABLE course(
cid int PRIMARY KEY AUTO_INCREMENT,
cname varchar(32) NOT NULL,
teacher_id int NOT NULL,
FOREIGN KEY (teacher_id) REFERENCES teacher (tid)
)
INSERT INTO course VALUES
(1, '生物', 1),
(2, '物理', 2),
(3, '体育', 3),
(4, '美术', 2);
CREATE TABLE student(
sid int(11) PRIMARY KEY AUTO_INCREMENT,
gender char(1) NOT NULL,
class_id int(11) NOT NULL,
sname varchar(32) NOT NULL,
FOREIGN KEY (class_id) REFERENCES class (cid)
)
INSERT INTO student VALUES
(1, '男', 1, '理解'),
(2, '女', 1, '钢蛋'),
(3, '男', 1, '张三'),
(4, '男', 1, '张一'),
(5, '女', 1, '张二'),
(6, '男', 1, '张四'),
(7, '女', 2, '铁锤'),
(8, '男', 2, '李三'),
(9, '男', 2, '李一'),
(10, '女', 2, '李二'),
(11, '男', 2, '李四'),
(12, '女', 3, '如花'),
(13, '男', 3, '刘三'),
(14, '男', 3, '刘一'),
(15, '女', 3, '刘二'),
(16, '男', 3, '刘四');
CREATE TABLE score (
sid int PRIMARY KEY AUTO_INCREMENT,
student_id int NOT NULL,
course_id int NOT NULL,
num int NOT NULL,
FOREIGN KEY (course_id) REFERENCES course (cid),
FOREIGN KEY (student_id) REFERENCES student(sid)
)
INSERT INTO score VALUES
(1, 1, 1, 10),
(2, 1, 2, 9),
(5, 1, 4, 66),
(6, 2, 1, 8),
(8, 2, 3, 68),
(9, 2, 4, 99),
(10, 3, 1, 77),
(11, 3, 2, 66),
(12, 3, 3, 87),
(13, 3, 4, 99),
(14, 4, 1, 79),
(15, 4, 2, 11),
(16, 4, 3, 67),
(17, 4, 4, 100),
(18, 5, 1, 79),
(19, 5, 2, 11),
(20, 5, 3, 67),
(21, 5, 4, 100),
(22, 6, 1, 9),
(23, 6, 2, 100),
(24, 6, 3, 67),
(25, 6, 4, 100),
(26, 7, 1, 9),
(27, 7, 2, 100),
(28, 7, 3, 67),
(29, 7, 4, 88),
(30, 8, 1, 9),
(31, 8, 2, 100),
(32, 8, 3, 67),
(33, 8, 4, 88),
(34, 9, 1, 91),
(35, 9, 2, 88),
(36, 9, 3, 67),
(37, 9, 4, 22),
(38, 10, 1, 90),
(39, 10, 2, 77),
(40, 10, 3, 43),
(41, 10, 4, 87),
(42, 11, 1, 90),
(43, 11, 2, 77),
(44, 11, 3, 43),
(45, 11, 4, 87),
(46, 12, 1, 90),
(47, 12, 2, 77),
(48, 12, 3, 43),
(49, 12, 4, 87),
(52, 13, 3, 87);