1.啟動Mysql服務

net start mysql

2.進入mysql環境中，由于自己沒有設置密碼，直接回車進入即可(要將bin加入到環境變量path中)

mysql -u root -p

3.創建一個數據庫

create database db_test default character set utf8 collate utf8_general_ci;

顯示數據庫：show databases;

使用某個數據庫：use db_test;

顯示該數據庫的字符的編碼：show variables like "%char%";

查看某個表的結構：desc student;

向student表中插入數據：4個字段，SId(學生ID),Sname(學生姓名)，Sage(學生年齡)，Ssex(學生性別)

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' , '1990-12-20' , '男');

insert into Student values('04' , '李云' , '1990-12-06' , '男');

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

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

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

insert into Student values('09' , '張三' , '2017-12-20' , '女');

insert into Student values('10' , '李四' , '2017-12-25' , '女');

insert into Student values('11' , '李四' , '2012-06-06' , '女');

insert into Student values('12' , '趙六' , '2013-06-13' , '女');

insert into Student values('13' , '孫七' , '2014-06-01' , '女');

查詢student表中的數據：select * from student;

同理：建立Teacher表，2個字段，TId(教師id)，Tname(教師姓名)

create table Teacher(TId varchar(10),Tname varchar(10),PRIMARY key (Tid));

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

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

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

建立課程表Course：

3個字段，CId(課程id)，Cname(課程名稱)，TId(教師id)

create table Course(CId varchar(10),Cname nvarchar(10),TId varchar(10),PRIMARY KEY(CId));

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

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

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

建立成績表Score:4個字段，skey(由于沒有不重復的字段，因此創建了主鍵字段)，SId(學生id)，CId(課程ID)，score(學生成績)

create table Score(skey int ,SId varchar(10),CId varchar(10),Scoreore decimal(18,1),PRIMARY key(skey));

insert into Score values('1','01' , '01' , 80);

insert into Score values('2','01' , '02' , 90);

insert into Score values('3','01' , '03' , 99);

insert into Score values('4','02' , '01' , 70);

insert into Score values('5','02' , '02' , 60);

insert into Score values('6','02' , '03' , 80);

insert into Score values('7','03' , '01' , 80);

insert into Score values('8','03' , '02' , 80);

insert into Score values('9','03' , '03' , 80);

insert into Score values('10','04' , '01' , 50);

insert into Score values('11','04' , '02' , 30);

insert into Score values('12','04' , '03' , 20);

insert into Score values('13','05' , '01' , 76);

insert into Score values('14','05' , '02' , 87);

insert into Score values('15','06' , '01' , 31);

insert into Score values('16','06' , '03' , 34);

insert into Score values('17','07' , '02' , 89);

insert into Score values('18','07' , '03' , 98);

總結

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