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MySQL查询练习--数据

数据

建库语句

DROP TABLE IF EXISTS test;
CREATE DATABASE IF NOT EXISTS test DEFAULT CHARACTER SET utf8;
USE test;

建表语句

/*******建学生表******/
CREATE TABLE student(
sno CHAR(10) PRIMARY KEY,
sname CHAR(20),
sage INT(2),
ssex CHAR(5)
);
/*******建教师表******/
CREATE TABLE teacher(
tno CHAR(10) PRIMARY KEY,
tname VARCHAR(20)
);
/*******建课程表******/
CREATE TABLE course(
cno CHAR(10),
cname VARCHAR(20),
tno CHAR(20)
);
/*******建成绩表******/
CREATE TABLE sc(
sno CHAR(10),
cno CHAR(10),
score DOUBLE(4,2)
);

插入数据

/*******初始化学生表的数据******/
INSERT INTO student(sno,sname,sage,ssex) VALUES ('s001','张三',23,'男');
INSERT INTO student VALUES ('s002','李四',23,'男');
INSERT INTO student VALUES ('s003','吴鹏',25,'男');
INSERT INTO student VALUES ('s004','琴沁',20,'女');
INSERT INTO student VALUES ('s005','王丽',20,'女');
INSERT INTO student VALUES ('s006','李波',21,'男');
INSERT INTO student VALUES ('s007','刘玉',21,'男');
INSERT INTO student VALUES ('s008','萧蓉',21,'女');
INSERT INTO student VALUES ('s009','陈萧晓',23,'女');
INSERT INTO student VALUES ('s010','陈美',22,'女');
COMMIT;
/******************初始化教师表***********************/
INSERT INTO teacher VALUES ('t001', '刘阳');
INSERT INTO teacher VALUES ('t002', '谌燕');
INSERT INTO teacher VALUES ('t003', '胡明星');
COMMIT;
/***************初始化课程表****************************/
INSERT INTO course VALUES ('c001','J2SE','t002');
INSERT INTO course VALUES ('c002','Java Web','t002');
INSERT INTO course VALUES ('c003','SSH','t001');
INSERT INTO course VALUES ('c004','Oracle','t001');
INSERT INTO course VALUES ('c005','SQL SERVER 2005','t003');
INSERT INTO course VALUES ('c006','C#','t003');
INSERT INTO course VALUES ('c007','JavaScript','t002');
INSERT INTO course VALUES ('c008','DIV+CSS','t001');
INSERT INTO course VALUES ('c009','PHP','t003');
INSERT INTO course VALUES ('c010','EJB3.0','t002');
COMMIT;
/***************初始化成绩表***********************/
INSERT INTO sc VALUES ('s001','c001',78.9);
INSERT INTO sc VALUES ('s002','c001',80.9);
INSERT INTO sc VALUES ('s003','c001',81.9);
INSERT INTO sc VALUES ('s004','c001',60.9);
INSERT INTO sc VALUES ('s001','c002',82.9);
INSERT INTO sc VALUES ('s002','c002',72.9);
INSERT INTO sc VALUES ('s003','c002',81.9);
INSERT INTO sc VALUES ('s001','c003',59);
COMMIT;

查看数据

/***************查询学生表***********************/
SELECT * FROM student
/***************查询成绩表***********************/
SELECT * FROM course
/***************查询教师表***********************/
SELECT * FROM teacher

/***************查询成绩表***********************/
SELECT * FROM sc

posted @ 2022-04-23 16:00  键天帝  阅读(58)  评论(0编辑  收藏  举报