mysql 有没有自带的 实例表，用作练习

MySQL没有自带供练习用的表。我们可以自行创建或导入数据表进行练习，这其实是很方便的。

例如下面几行代码就完成了数据库和数据表的创建并插入7行数据：

create database test

use test

create table orderproduct(orderid char(11) primary key,productid varchar(255))

insert into orderproduct values

(20161116001,'D0020'),

(20161116035,'E0055'),

(20161101048,'A0035'),

(20161005321,'B0049'),

(20160901515,'C0038'),

(20160814525,'C0038,A0035,E0055'),

(20160714510,'D0020,B0049')

这是oracle的建表脚本，把一些比如varchar2改成varchar，number改成int，to_date()函数去掉就差不多了，其他的根据mysql语法自己改吧。

DROP TABLE DEPT

CREATE TABLE DEPT

(DEPTNO NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY,

DNAME VARCHAR2(14) ,

LOC VARCHAR2(13) )

DROP TABLE EMP

CREATE TABLE EMP

(EMPNO NUMBER(4) CONSTRAINT PK_EMP PRIMARY KEY,

ENAME VARCHAR2(10),

JOB VARCHAR2(9),

MGR NUMBER(4),

HIREDATE DATE,

SAL NUMBER(7,2),

COMM NUMBER(7,2),

DEPTNO NUMBER(2) CONSTRAINT FK_DEPTNO REFERENCES DEPT)

INSERT INTO DEPT VALUES

(10,'ACCOUNTING','NEW YORK')

INSERT INTO DEPT VALUES (20,'RESEARCH','DALLAS')

INSERT INTO DEPT VALUES

(30,'SALES','CHICAGO')

INSERT INTO DEPT VALUES

(40,'OPERATIONS','BOSTON')

INSERT INTO EMP VALUES

(7369,'SMITH','CLERK',7902,to_date('17-12-1980','dd-mm-yyyy'),800,NULL,20)

INSERT INTO EMP VALUES

(7499,'ALLEN','SALESMAN',7698,to_date('20-2-1981','dd-mm-yyyy'),1600,300,30)

INSERT INTO EMP VALUES

(7521,'WARD','SALESMAN',7698,to_date('22-2-1981','dd-mm-yyyy'),1250,500,30)

INSERT INTO EMP VALUES

(7566,'JONES','MANAGER',7839,to_date('2-4-1981','dd-mm-yyyy'),2975,NULL,20)

INSERT INTO EMP VALUES

(7654,'MARTIN','SALESMAN',7698,to_date('28-9-1981','dd-mm-yyyy'),1250,1400,30)

INSERT INTO EMP VALUES

(7698,'BLAKE','MANAGER',7839,to_date('1-5-1981','dd-mm-yyyy'),2850,NULL,30)

INSERT INTO EMP VALUES

(7782,'CLARK','MANAGER',7839,to_date('9-6-1981','dd-mm-yyyy'),2450,NULL,10)

INSERT INTO EMP VALUES

(7788,'SCOTT','ANALYST',7566,to_date('13-JUL-87')-85,3000,NULL,20)

INSERT INTO EMP VALUES

(7839,'KING','PRESIDENT',NULL,to_date('17-11-1981','dd-mm-yyyy'),5000,NULL,10)

INSERT INTO EMP VALUES

(7844,'TURNER','SALESMAN',7698,to_date('8-9-1981','dd-mm-yyyy'),1500,0,30)

INSERT INTO EMP VALUES

(7876,'ADAMS','CLERK',7788,to_date('13-JUL-87')-51,1100,NULL,20)

INSERT INTO EMP VALUES

(7900,'JAMES','CLERK',7698,to_date('3-12-1981','dd-mm-yyyy'),950,NULL,30)

INSERT INTO EMP VALUES

(7902,'FORD','ANALYST',7566,to_date('3-12-1981','dd-mm-yyyy'),3000,NULL,20)

INSERT INTO EMP VALUES

(7934,'MILLER','CLERK',7782,to_date('23-1-1982','dd-mm-yyyy'),1300,NULL,10)

DROP TABLE BONUS

CREATE TABLE BONUS

(

ENAME VARCHAR2(10) ,

JOB VARCHAR2(9) ,

SAL NUMBER,

COMM NUMBER

)

DROP TABLE SALGRADE

CREATE TABLE SALGRADE

( GRADE NUMBER,

LOSAL NUMBER,

HISAL NUMBER )

INSERT INTO SALGRADE VALUES (1,700,1200)

INSERT INTO SALGRADE VALUES (2,1201,1400)

INSERT INTO SALGRADE VALUES (3,1401,2000)

INSERT INTO SALGRADE VALUES (4,2001,3000)

INSERT INTO SALGRADE VALUES (5,3001,9999)

COMMIT

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