From 21f5c800e6c28bbe874a858c5d259588c7a34ac0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=97=B6=E5=AD=A6=E5=AE=89?= <2820601363@qq.com>
Date: Thu, 19 Oct 2023 19:57:56 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?=
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---
 ...14\347\273\203\344\271\240\351\242\230.md" | 101 ++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 "40 \346\227\266\345\255\246\345\256\211/20231019\345\215\201\344\272\214\347\273\203\344\271\240\351\242\230.md"

diff --git "a/40 \346\227\266\345\255\246\345\256\211/20231019\345\215\201\344\272\214\347\273\203\344\271\240\351\242\230.md" "b/40 \346\227\266\345\255\246\345\256\211/20231019\345\215\201\344\272\214\347\273\203\344\271\240\351\242\230.md"
new file mode 100644
index 0000000..f13b366
--- /dev/null
+++ "b/40 \346\227\266\345\255\246\345\256\211/20231019\345\215\201\344\272\214\347\273\203\344\271\240\351\242\230.md"	
@@ -0,0 +1,101 @@
+~~~ mysql
+CREATE DATABASE uu charset utf8;
+use uu;
+-- 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);
+
+
+
+
+
+
+-- 1、列出最低薪金大于1500的各种工作。
+SELECT job FROM emp GROUP BY job HAVING min(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 ename FROM emp WHERE deptno=(SELECT deptno FROM dept WHERE dname='销售部');
+
+
+-- 3、列出薪金高于公司平均薪金的所有员工。
+SELECT * FROM emp where sal>(SELECT avg(sal) FROM emp);
+
+
+-- 4、列出与"周八"从事相同工作的所有员工。
+SELECT * 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 emp WHERE 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>(SELECT max(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 deptno 部门,count(*)员工数量,avg(sal)平均工资,AVG(TIMESTAMPDIFF(year,hiredate,NOW()))平均服务年限 FROM emp GROUP BY deptno;
+
+
+-- 8、列出所有员工的姓名、部门名称和工资。
+ SELECT ename,dname,sal FROM emp a JOIN dept b on b.deptno=a.deptno;
+
+
+-- 9、列出所有部门的详细信息和部门人数。
+ select * from dept a left join (select deptno,count(*)from emp group by deptno) b on a.deptno=b.deptno;
+
+
+-- 10、列出各种工作的最低工资。
+ SELECT job,min(sal) FROM emp GROUP BY job;
+
+
+-- 11、列出各个部门的 经理 的最低薪金。
+ SELECT deptno 部门,min(sal) 最低薪资 FROM emp WHERE job='经理' GROUP BY deptno;
+
+
+-- 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;
+
+
+
+
+
+
+
+
+~~~
+
-- 
Gitee