From ee60c012ab2226accef636eadfc2d664d1c49c2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=B0=B8=E6=B7=B3?= <2678158018@qq.com>
Date: Mon, 11 Sep 2023 22:22:09 +0800
Subject: [PATCH 1/2] =?UTF-8?q?=E7=AC=AC=E5=9B=9B=E6=AC=A1=E7=AC=94?=
 =?UTF-8?q?=E8=AE=B0?=
MIME-Version: 1.0
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---
 .../20230911\347\254\224\350\256\260.md"              | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 "18 \345\276\220\346\260\270\346\267\263/20230911\347\254\224\350\256\260.md"

diff --git "a/18 \345\276\220\346\260\270\346\267\263/20230911\347\254\224\350\256\260.md" "b/18 \345\276\220\346\260\270\346\267\263/20230911\347\254\224\350\256\260.md"
new file mode 100644
index 0000000..c85fbbb
--- /dev/null
+++ "b/18 \345\276\220\346\260\270\346\267\263/20230911\347\254\224\350\256\260.md"	
@@ -0,0 +1,11 @@
+软件:powerDesigner
+
+powerDesigner的使用过程，以及将概念模型转成数据库
+
+首先 ，先创建概念模型（类似于E-R图）CMD客户的角度
+
+其次，转为逻辑模型，LDM（以计算机的角度）
+
+再次，转成物理模型，PDM（以数据库的角度）
+
+最后，转为DDL
\ No newline at end of file
-- 
Gitee


From be24b1c43dd2873c39e42d90d20b7c0a951e9e6a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=90=E6=B0=B8=E6=B7=B3?= <2678158018@qq.com>
Date: Mon, 11 Sep 2023 22:22:57 +0800
Subject: [PATCH 2/2] =?UTF-8?q?=E7=AC=AC=E4=BA=8C=E6=AC=A1=E4=BD=9C?=
 =?UTF-8?q?=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../20230911\344\275\234\344\270\232.md"      | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 "18 \345\276\220\346\260\270\346\267\263/20230911\344\275\234\344\270\232.md"

diff --git "a/18 \345\276\220\346\260\270\346\267\263/20230911\344\275\234\344\270\232.md" "b/18 \345\276\220\346\260\270\346\267\263/20230911\344\275\234\344\270\232.md"
new file mode 100644
index 0000000..f58f1bb
--- /dev/null
+++ "b/18 \345\276\220\346\260\270\346\267\263/20230911\344\275\234\344\270\232.md"	
@@ -0,0 +1,66 @@
+````mysql
+*==============================================================*/
+/* DBMS name:      MySQL 5.0                                    */
+/* Created on:     2023/9/11 22:13:24                           */
+/*==============================================================*/
+CREATE DATABASE books charset utf8;
+use books;
+
+drop table if exists book;
+
+drop table if exists guanli;
+
+drop table if exists jie;
+
+drop table if exists librarian;
+
+drop table if exists library;
+
+drop table if exists reader;
+
+drop table if exists system;
+
+/*==============================================================*/
+/* Table: book                                                  */
+/*==============================================================*/
+create table book
+(
+   bo_id                char(10) not null,
+   sys_id               int not null,
+   bo_name              char(10) not null,
+   bo_author            char(10) not null,
+   primary key (bo_id)
+);
+
+/*==============================================================*/
+/* Table: guanli                                                */
+/*==============================================================*/
+create table guanli
+(
+   sys_id               int not null,
+   rar_id               int not null,
+   primary key (sys_id, rar_id)
+);
+
+/*==============================================================*/
+/* Table: jie                                                   */
+/*==============================================================*/
+create table jie
+(
+   bo_id                char(10) not null,
+   re_id                int not null,
+   rar_id               int,
+   primary key (bo_id, re_id)
+);
+
+/*==============================================================*/
+/* Table: librarian                                             */
+/*==============================================================*/
+create table librarian
+(
+   rar_id               int not null auto_increment,
+   lib_id               int not null,
+   rar_name             varch
+```
+````
+
-- 
Gitee