更新了部分文档

Author: jackfrued

Day36-40/code/all/HRS_create_and_init.sql

@@ -1,51 +1,55 @@
--- 创建人力资源管理系统数据库
-drop database if exists HRS;
-create database HRS default charset utf8;
--- 切换数据库上下文环境
-use HRS;
--- 删除表
-drop table if exists TbEmp;
-drop table if exists TbDept;
--- 创建部门表
-create table TbDept
+drop database if exists hrs;
+create database hrs default charset utf8;
+
+use hrs;
+
+drop table if exists tb_emp;
+drop table if exists tb_dept;
+
+create table tb_dept
 (
-deptno tinyint primary key,	-- 部门编号
-dname varchar(10) not null,	-- 部门名称
-dloc varchar(20) not null	-- 部门所在地
+dno int not null comment '编号',
+dname varchar(10) not null comment '名称',
+dloc varchar(20) not null comment '所在地',
+primary key (dno)
 );
--- 添加部门记录
-insert into TbDept values (10, '会计部', '北京');
-insert into TbDept values (20, '研发部', '成都');
-insert into TbDept values (30, '销售部', '重庆');
-insert into TbDept values (40, '运维部', '深圳');
--- 创建员工表
-create table TbEmp
+
+insert into tb_dept values 
+	(10, '会计部', '北京'),
+	(20, '研发部', '成都'),
+	(30, '销售部', '重庆'),
+	(40, '运维部', '深圳');
+
+create table tb_emp
 (
-empno int primary key,		-- 员工编号
-ename varchar(20) not null,	-- 员工姓名
-job varchar(20) not null,	-- 员工职位
-mgr int,					-- 主管编号
-sal int not null,			-- 员工月薪
-comm int,					-- 每月补贴
-dno tinyint					-- 所在部门编号
+eno int not null comment '员工编号',
+ename varchar(20) not null comment '员工姓名',
+job varchar(20) not null comment '员工职位',
+mgr int comment '主管编号',
+sal int not null comment '员工月薪',
+comm int comment '每月补贴',
+dno int comment '所在部门编号',
+primary key (eno)
 );
--- 添加外键约束
-alter table TbEmp add constraint fk_dno foreign key (dno) references TbDept(deptno);
--- 添加员工记录
-insert into TbEmp values (7800, '张三丰', '总裁', null, 9000, 1200, 20);
-insert into TbEmp values (2056, '乔峰', '分析师', 7800, 5000, 1500, 20);
-insert into TbEmp values (3088, '李莫愁', '设计师', 2056, 3500, 800, 20);
-insert into TbEmp values (3211, '张无忌', '程序员', 2056, 3200, null, 20);
-insert into TbEmp values (3233, '丘处机', '程序员', 2056, 3400, null, 20);
-insert into TbEmp values (3251, '张翠山', '程序员', 2056, 4000, null, 20);
-insert into TbEmp values (5566, '宋远桥', '会计师', 7800, 4000, 1000, 10);
-insert into TbEmp values (5234, '郭靖', '出纳', 5566, 2000, null, 10);
-insert into TbEmp values (3344, '黄蓉', '销售主管', 7800, 3000, 800, 30);
-insert into TbEmp values (1359, '胡一刀', '销售员', 3344, 1800, 200, 30);
-insert into TbEmp values (4466, '苗人凤', '销售员', 3344, 2500, null, 30);
-insert into TbEmp values (3244, '欧阳锋', '程序员', 3088, 3200, null, 20);
-insert into TbEmp values (3577, '杨过', '会计', 5566, 2200, null, 10);
-insert into TbEmp values (3588, '朱九真', '会计', 5566, 2500, null, 10);
+
+alter table tb_emp add constraint fk_emp_dno foreign key (dno) references tb_dept (dno);
+
+insert into tb_emp values 
+	(7800, '张三丰', '总裁', null, 9000, 1200, 20),
+	(2056, '乔峰', '分析师', 7800, 5000, 1500, 20),
+	(3088, '李莫愁', '设计师', 2056, 3500, 800, 20),
+	(3211, '张无忌', '程序员', 2056, 3200, null, 20),
+	(3233, '丘处机', '程序员', 2056, 3400, null, 20),
+	(3251, '张翠山', '程序员', 2056, 4000, null, 20),
+	(5566, '宋远桥', '会计师', 7800, 4000, 1000, 10),
+	(5234, '郭靖', '出纳', 5566, 2000, null, 10),
+	(3344, '黄蓉', '销售主管', 7800, 3000, 800, 30),
+	(1359, '胡一刀', '销售员', 3344, 1800, 200, 30),
+	(4466, '苗人凤', '销售员', 3344, 2500, null, 30),
+	(3244, '欧阳锋', '程序员', 3088, 3200, null, 20),
+	(3577, '杨过', '会计', 5566, 2200, null, 10),
+	(3588, '朱九真', '会计', 5566, 2500, null, 10);
+
 
 -- 查询薪资最高的员工姓名和工资
 
@@ -67,22 +71,22 @@ insert into TbEmp values (3588, '朱九真', '会计', 5566, 2500, null, 10);
 
 -- 查询薪资排名4~6名的员工姓名和工资
 
-use HRS;
+-- use hrs;
 
-drop procedure if exists sp_avg_sal_by_dept;
+-- drop procedure if exists sp_avg_sal_by_dept;
 
 
-create procedure sp_avg_sal_by_dept(deptno integer, out avg_sal float)
-begin 
-    select avg(sal) into avg_sal from TbEmp where dno=deptno;
-end;
+-- create procedure sp_avg_sal_by_dept(dno integer, out avg_sal float)
+-- begin 
+--     select avg(sal) into avg_sal from tb_emp where dno=dno;
+-- end;
 
 
 
 
-call sp_avg_sal_by_dept(10, @avgSal);
+-- call sp_avg_sal_by_dept(10, @avgSal);
 
-select @avgSal;
+-- select @avgSal;