SQL数据查询2

USE h
CREATE TABLE zy1(
       empno INT,
       ename VARCHAR(10),
       job VARCHAR(10),
       mgr INT,
       hiredate DATE,
       sal DOUBLE,
       COOM DOUBLE,
       deptno INT
       )
 DROP TABLE zy1 
 DESC zy1;
 SELECT * FROM zy1
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1001,'甘宁','文员',1013,'2000-12-17',8000,20);
 INSERT INTO zy1 VALUES(1002,'黛绮丝','销售员',1006,'2001-02-20',16000,3000,20);
 UPDATE zy1 SET sal=16000,deptno=30 WHERE empno=1002;
 INSERT INTO zy1 VALUES(1003,'殷天正','销售员',1006,'2001-02-22',12500,5000,20);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1004,'刘备','经理',1009,'2001-04-02',29750,20);
 INSERT INTO zy1 VALUES(1005,'谢逊','销售员',1006,'2001-09-28',12500,14000.00,30);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1006,'关羽','经理',1009,'2001-05-01',28500.00,30);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1007,'张飞','经理',1009,'2001-09-01',24500.00,10);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1008,'诸葛亮','分析师',1004,'2007-04-19',30000.00,20);
 INSERT INTO zy1(empno,ename,job,hiredate,sal,deptno) VALUES(1009,'曾阿牛','董事长','2001-11-17',50000.00,10);
 INSERT INTO zy1 VALUES(1010,'韦一笑','销售员',1006,'2001-09-08',15000.00,0.00,30);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1011,'周泰','文员',1008,'2007-05-23',11000.00,20);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1012,'程普','文员',1006,'2001-12-03',9500.00,30);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1012,'庞统','分析师',1004,'2001-12-03',30000.00,20);
 INSERT INTO zy1(empno,ename,job,mgr,hiredate,sal,deptno) VALUES(1014,'黄盖','文员',1007,'2002-01-03',13000.00,10);
 INSERT INTO zy1 VALUES(1015,'张三','保洁员',1001,'2013-05-01',80000,50000,50);
 /*查询出部门编号为30的所有员工*/
 SELECT * FROM zy1 WHERE deptno=30;
 /*所有销售员的姓名、编号和部门编号*/
 SELECT ename,empno,deptno FROM zy1 WHERE job='销售员';
 /*找出奖金高于工资的员工*/
 SELECT * FROM zy1 WHERE COOM>sal;
 /*找出奖金高于工资60%的员工。*/
 SELECT * FROM zy1 WHERE COOM>(sal*1.6);
 /*找出部门编号为10中所有经理，和部门编号为20中所有销售员的详细资料*/
 SELECT * FROM zy1 WHERE deptno=10 AND job='经理' OR deptno=20 AND job='销售员';
 /* 找出部门编号为10中所有经理，和部门编号为20中所有销售员的详细资料*/
 SELECT * FROM zy1 WHERE deptno=10 AND job='经理' OR deptno=20 AND job='销售员' OR deptno<>'经理' AND deptno<>'销售员' AND sal>=20000;
/*无奖金或奖金低于1000的员工。*/
 SELECT * FROM zy1 WHERE COOM IS NULL OR COOM=0 OR COOM<1000;
 /*查询名字由三个字组成的员工*/
 SELECT * FROM zy1 WHERE ename LIKE '___';
 /*查询2000年入职的员工*/
 SELECT * FROM zy1 WHERE hiredate BETWEEN 20000101 AND 20010101;
 /*查询所有员工详细信息，用编号升序排序*/
 SELECT * FROM zy1 ORDER BY empno ASC;
 /*查询所有员工详细信息，用工资降序排序，如果工资相同使用入职日期升序排序*/
 SELECT * FROM zy1 ORDER BY sal DESC,hiredate ASC;
 /*查询姓周的两个名字的员工*/
 SELECT * FROM zy1 WHERE ename LIKE '周_';
 /*查询所有姓张的员工*/
 SELECT * FROM zy1 WHERE ename LIKE '张%';
 /*14.    查询该部门有多少个岗位，每个岗位有多少人*/
 SELECT job AS '岗位',COUNT(*) AS '人数' FROM zy1 GROUP BY job;
 /*查询哪个岗位中人数大于3*/
 SELECT job AS '岗位',COUNT(*) AS '人数' FROM zy1 GROUP BY job HAVING COUNT(*)>3;