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+~~~mysql
+CREATE database shujuku charset utf8;
+use shujuku;
+
+-- 部门表
+create table dept(
+	deptno int primary key auto_increment, -- 部门编号
+	dname varchar(14) ,	  -- 部门名字
+	loc varchar(13)   -- 地址
+) ;
+-- 员工表
+create table emp(
+	empno int primary key auto_increment,-- 员工编号
+	ename varchar(10), -- 员工姓名										-
+	job varchar(9),	-- 岗位
+	mgr int,	 -- 直接领导编号
+	hiredate date, -- 雇佣日期，入职日期
+	sal int, -- 薪水
+	comm int,  -- 提成
+	deptno int not null, -- 部门编号
+	foreign key (deptno) references dept(deptno)
+);
+insert into dept values(10,'财务部','北京');
+insert into dept values(20,'研发部','上海');
+insert into dept values(30,'销售部','广州');
+insert into dept values(40,'行政部','深圳');
+insert into emp values(7369,'刘一','职员',7902,'1980-12-17',800,null,20);
+insert into emp values(7499,'陈二','推销员',7698,'1981-02-20',1600,300,30);
+insert into emp values(7521,'张三','推销员',7698,'1981-02-22',1250,500,30);
+insert into emp values(7566,'李四','经理',7839,'1981-04-02',2975,null,20);
+insert into emp values(7654,'王五','推销员',7698,'1981-09-28',1250,1400,30);
+insert into emp values(7698,'赵六','经理',7839,'1981-05-01',2850,null,30);
+insert into emp values(7782,'孙七','经理',7839,'1981-06-09',2450,null,10);
+insert into emp values(7788,'周八','分析师',7566,'1987-06-13',3000,null,20);
+insert into emp values(7839,'吴九','总裁',null,'1981-11-17',5000,null,10);
+insert into emp values(7844,'郑十','推销员',7698,'1981-09-08',1500,0,30);
+insert into emp values(7876,'郭十一','职员',7788,'1987-06-13',1100,null,20);
+insert into emp values(7900,'钱多多','职员',7698,'1981-12-03',950,null,30);
+insert into emp values(7902,'大锦鲤','分析师',7566,'1981-12-03',3000,null,20);
+insert into emp values(7934,'木有钱','职员',7782,'1983-01-23',1300,null,10);
+-- 完成以下练习题
+
+-- 1、列出最低薪金大于1500的各种工作。
+SELECT DISTINCT job ,min(sal) over (PARTITION by job) from emp where sal > 1500;
+-- 2、列出在部门 "销售部" 工作的员工的姓名，假定不知道销售部的部门编号。
+SELECT deptno from dept where dname = '销售部';
+SELECT ename from emp where deptno = 30;
+ 
+-- 3、列出薪金高于公司平均薪金的所有员工
+SELECT ename from emp where sal > (SELECT sum(sal)/14 from emp );
+-- 4、列出与"周八"从事相同工作的所有员工。
+
+SELECT ename from emp where job = (SELECT job from emp where ename = '周八');
+-- 5、列出薪金等于     部门30中员工的薪金的    所有员工的姓名和薪金。
+SELECT ename ,sal from dept d , emp e where d.deptno=e.deptno and sal in (SELECT sal from emp where deptno = 30); 
+-- 6、列出薪金高于在部门30工作的所有员工的薪金的员工姓名和薪金。
+SELECT ename ,sal from emp where sal > any(SELECT sal from emp where deptno = 30); 
+-- 7、列出在每个部门工作的员工数量、平均工资、平均服务年限。
+SELECT count(empno ) over (PARTITION by deptno ) 员工数量,avg(sal) over (PARTITION by deptno ) ,avg(hiredate) over (PARTITION by deptno ) from emp ; 
+-- 8、列出所有员工的姓名、部门名称和工资。
+SELECT e.ename ,d.dname , sal from dept d,emp e where d.deptno=e.deptno;
+-- 9、列出所有部门的详细信息和部门人数。
+SELECT *,count(*) over (PARTITION by dname )  部门人数 from dept d, emp e where d.deptno= e.deptno;
+-- 10、列出各种工作的最低工资。
+SELECT job,min(sal) over (PARTITION by deptno) from emp ;
+-- 11、列出各个部门的 经理 的最低薪金
+SELECT deptno, min(sal) over (partition by deptno)from emp where job ='经理';
+-- 12、列出所有员工的年工资,按年薪从低到高排序。 
+SELECT ename ,sal*12 from emp ORDER BY sal;
+
+
+
+
+
+
+
+
+
+
+
+~~~
+