数据库练习题之员工部门和工资

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已于 2023-10-24 16:17:10 修改 · 208 阅读

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#数据库 #sql #java #1024程序员节

于 2023-10-20 16:21:05 首次发布

1.表结构

##部门表
#DROP IF EXISTS TABLE DEPT;
CREATE TABLE DEPT(
	DEPTNO int  PRIMARY KEY,##部门编号
	DNAME VARCHAR(14) ,	##部门名称
	LOC VARCHAR(13)  	##部门地址
	) ;

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');
	
##员工表	
#DROP IF EXISTS TABLE EMP;
CREATE TABLE EMP(
	EMPNO int  PRIMARY KEY,	#员工编号
	ENAME VARCHAR(10),	#员工姓名
	JOB VARCHAR(9),		#员工工作
	MGR int, 		#员工直属领导编号
	HIREDATE DATE, 		#入职时间
	SAL double,		#工资
	COMM double,		#奖金
	DEPTNO int		#对应dept表的外键
);  
## 添加 部门 和 员工 之间的主外键关系
ALTER TABLE EMP ADD CONSTRAINT FOREIGN KEY EMP(DEPTNO) REFERENCES DEPT (DEPTNO);

INSERT INTO EMP VALUES(7369,'SMITH','CLERK',7902,"1980-12-17",800,NULL,20);
INSERT INTO EMP VALUES(7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30);
INSERT INTO EMP VALUES(7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30);
INSERT INTO EMP VALUES(7566,'JONES','MANAGER',7839,'1981-04-02',2975,NULL,20);
INSERT INTO EMP VALUES(7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30);
INSERT INTO EMP VALUES(7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,NULL,30);
INSERT INTO EMP VALUES(7782,'CLARK','MANAGER',7839,'1981-06-09',2450,NULL,10);
INSERT INTO EMP VALUES(7788,'SCOTT','ANALYST',7566,'1987-07-03',3000,NULL,20);
INSERT INTO EMP VALUES(7839,'KING','PRESIDENT',NULL,'1981-11-17',5000,NULL,10);
INSERT INTO EMP VALUES(7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,0,30);
INSERT INTO EMP VALUES(7876,'ADAMS','CLERK',7788,'1987-07-13',1100,NULL,20);
INSERT INTO EMP VALUES(7900,'JAMES','CLERK',7698,'1981-12-03',950,NULL,30);
INSERT INTO EMP VALUES(7902,'FORD','ANALYST',7566,'1981-12-03',3000,NULL,20);
INSERT INTO EMP VALUES(7934,'MILLER','CLERK',7782,'1981-01-23',1300,NULL,10);

#工资等级表
#DROP IF EXISTS TABLE SAL