测试数据：
---------------------------------------------MySQL---------------------------------------------------
create table dept
(
deptno int not null,
dname varchar(14),
loc varchar(13)
)
insert into dept(deptno,dname,loc) values(10,'ACCOUNTING','NEW YORK');
insert into dept(deptno,dname,loc) values(20,'RESEARCH','DALLAS');
insert into dept(deptno,dname,loc) values(30,'SALES','CHICAGO');
insert into dept(deptno,dname,loc) values(40,'OPERATIONS','BOSTON');
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create table emp
(
empno int not null,
ename varchar(10),
job varchar(9),
mgr int,
hiredate date,
sal float,
comm float,
deptno int
)
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7369,'SMITH','CLERK',7902,'1980-12-17',800,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7566,'JONES','MANAGER',7839,'1981-04-02',2975,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7782,'CLARK','MANAGER',7839,'1981-06-09',2450,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7788,'SCOTT','ANALYST',7566,'1987-04-19',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7839,'KING','PRESIDENT',null,'1981-11-17',5000,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7876,'ADAMS','CLERK',7788,'1987-05-23',1100,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7900,'JAMES','CLERK',7698,'1981-12-03',950,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7902,'FORD','ANALYST',7566,'1981-12-03',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(7934,'MILLER','CLERK',7782,'1982-01-23',1300,null,10);
-------------------------------Hive--------------------------------------------------------------------------------------------
create table chavin.DEPT
(
DEPTNO int,
DNAME string,
LOC string
) row format delimited fields terminated by ' ';
create table chavin.EMP
(
EMPNO int,
ENAME string,
JOB string,
MGR int,
HIREDATE string,
SAL float,
COMM float,
DEPTNO int
) row format delimited fields terminated by ' ';
----------------------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
-----------------------
7369 SMITH CLERK 7902 1980-12-17 800.00 20
7499 ALLEN SALESMAN 7698 1981-02-20 1600.00 300.00 30
7521 WARD SALESMAN 7698 1981-02-22 1250.00 500.00 30
7566 JONES MANAGER 7839 1981-04-02 2975.00 20
7654 MARTIN SALESMAN 7698 1981-09-28 1250.00 1400.00 30
7698 BLAKE MANAGER 7839 1981-05-01 2850.00 30
7782 CLARK MANAGER 7839 1981-06-09 2450.00 10
7788 SCOTT ANALYST 7566 1987-04-19 3000.00 20
7839 KING PRESIDENT 1981-11-17 5000.00 10
7844 TURNER SALESMAN 7698 1981-09-08 1500.00 0.00 30
7876 ADAMS CLERK 7788 1987-05-23 1100.00 20
7900 JAMES CLERK 7698 1981-12-03 950.00 30
7902 FORD ANALYST 7566 1981-12-03 3000.00 20
7934 MILLER CLERK 7782 1982-01-23 1300.00 10
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