From cde784e1aed604b4bb4252b83a5add0f938ab188 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=A8=8B=E5=B8=85=E7=BF=94?= <3371439772@qq.com>
Date: Mon, 11 Sep 2023 23:16:01 +0800
Subject: [PATCH] =?UTF-8?q?9=E6=9C=888=E6=97=A5=E4=BD=9C=E4=B8=9A?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../crebas.sql"                               | 122 ++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 "52\345\217\267 \347\250\213\345\270\205\347\277\224/crebas.sql"

diff --git "a/52\345\217\267 \347\250\213\345\270\205\347\277\224/crebas.sql" "b/52\345\217\267 \347\250\213\345\270\205\347\277\224/crebas.sql"
new file mode 100644
index 0000000..9125d3c
--- /dev/null
+++ "b/52\345\217\267 \347\250\213\345\270\205\347\277\224/crebas.sql"	
@@ -0,0 +1,122 @@
+/*==============================================================*/
+/* DBMS name:      MySQL 5.0                                    */
+/* Created on:     2023/9/11 22:59:04                           */
+/*==============================================================*/
+
+
+drop table if exists Relationship_3;
+
+drop table if exists class;
+
+drop table if exists library;
+
+drop table if exists reader;
+
+drop table if exists student;
+
+drop table if exists "tea and stu";
+
+drop table if exists teacher;
+
+/*==============================================================*/
+/* Table: Relationship_3                                        */
+/*==============================================================*/
+create table Relationship_3
+(
+   cl_id                int not null,
+   tea_id               int not null,
+   primary key (cl_id, tea_id)
+);
+
+/*==============================================================*/
+/* Table: class                                                 */
+/*==============================================================*/
+create table class
+(
+   cl_id                int not null,
+   stu_id               int not null,
+   cl_name              char(10) not null,
+   primary key (cl_id)
+);
+
+/*==============================================================*/
+/* Table: library                                               */
+/*==============================================================*/
+create table library
+(
+   li_id                int not null,
+   li_name              char(10) not null,
+   li_number            char(11) not null,
+   primary key (li_id)
+);
+
+/*==============================================================*/
+/* Table: reader                                                */
+/*==============================================================*/
+create table reader
+(
+   re_id                varchar(110) not null,
+   li_id                int not null,
+   re_name              varchar(11) not null,
+   re_number            varchar(11) not null,
+   primary key (re_id)
+);
+
+/*==============================================================*/
+/* Table: student                                               */
+/*==============================================================*/
+create table student
+(
+   stu_id               int not null,
+   li_id                int not null,
+   stu_name             char(10) not null,
+   stu_number           char(11) not null,
+   primary key (stu_id)
+);
+
+/*==============================================================*/
+/* Table: "tea and stu"                                         */
+/*==============================================================*/
+create table "tea and stu"
+(
+   stu_id               int not null,
+   tea_id               int not null,
+   primary key (stu_id, tea_id)
+);
+
+/*==============================================================*/
+/* Table: teacher                                               */
+/*==============================================================*/
+create table teacher
+(
+   tea_id               int not null,
+   li_id                int not null,
+   tea_name             char(10) not null,
+   tea_number           char(11) not null,
+   primary key (tea_id)
+);
+
+alter table Relationship_3 add constraint FK_Relationship_3 foreign key (cl_id)
+      references class (cl_id) on delete restrict on update restrict;
+
+alter table Relationship_3 add constraint FK_Relationship_4 foreign key (tea_id)
+      references teacher (tea_id) on delete restrict on update restrict;
+
+alter table class add constraint FK_xuexi foreign key (stu_id)
+      references student (stu_id) on delete restrict on update restrict;
+
+alter table reader add constraint FK_kehu foreign key (li_id)
+      references library (li_id) on delete restrict on update restrict;
+
+alter table student add constraint FK_jieyue foreign key (li_id)
+      references library (li_id) on delete restrict on update restrict;
+
+alter table "tea and stu" add constraint "FK_tea and stu" foreign key (stu_id)
+      references student (stu_id) on delete restrict on update restrict;
+
+alter table "tea and stu" add constraint "FK_tea and stu2" foreign key (tea_id)
+      references teacher (tea_id) on delete restrict on update restrict;
+
+alter table teacher add constraint FK_yonghu foreign key (li_id)
+      references library (li_id) on delete restrict on update restrict;
+
-- 
Gitee