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@@ -0,0 +1,184 @@
+## 图书馆管理系统
+
+
+
+```
+
+
+
+/*==============================================================*/
+/* DBMS name:      MySQL 5.0                                    */
+/* Created on:     2023/9/11 10:47:30                           */
+/*==============================================================*/
+
+
+drop table if exists Book;
+
+drop table if exists Bookshelf;
+
+drop table if exists Floor;
+
+drop table if exists Librarian;
+
+drop table if exists Library;
+
+drop table if exists Return_book;
+
+drop table if exists borrower;
+
+drop table if exists type;
+
+drop table if exists 借书;
+
+drop table if exists 入库;
+
+drop table if exists 分类;
+
+/*==============================================================*/
+/* Table: Book                                                  */
+/*==============================================================*/
+create table Book
+(
+   book_id              int not null,
+   Li_num               int not null,
+   book_name            char(255) not null,
+   primary key (book_id)
+);
+
+/*==============================================================*/
+/* Table: Bookshelf                                             */
+/*==============================================================*/
+create table Bookshelf
+(
+   Bo_shelf_id          int not null auto_increment,
+   Fl_num               int not null,
+   Bo_shelf_name        char(255) not null,
+   primary key (Bo_shelf_id)
+);
+
+/*==============================================================*/
+/* Table: Floor                                                 */
+/*==============================================================*/
+create table Floor
+(
+   Fl_num               int not null auto_increment,
+   Lib_num              int not null,
+   Fl_belong            char(255) not null,
+   primary key (Fl_num)
+);
+
+/*==============================================================*/
+/* Table: Librarian                                             */
+/*==============================================================*/
+create table Librarian
+(
+   Li_num               int not null,
+   Li_name              char(255) not null,
+   primary key (Li_num)
+);
+
+/*==============================================================*/
+/* Table: Library                                               */
+/*==============================================================*/
+create table Library
+(
+   Lib_num              int not null,
+   Lib_name             char(255) not null,
+   primary key (Lib_num)
+);
+
+/*==============================================================*/
+/* Table: Return_book                                           */
+/*==============================================================*/
+create table Return_book
+(
+   Re_book              int not null,
+   Re_name              char(255) not null,
+   primary key (Re_book)
+);
+
+/*==============================================================*/
+/* Table: borrower                                              */
+/*==============================================================*/
+create table borrower
+(
+   borr_num             int not null,
+   borr_name            char(255) not null,
+   borr_date            date not null,
+   borr_add             char(255) not null,
+   primary key (borr_num)
+);
+
+/*==============================================================*/
+/* Table: type                                                  */
+/*==============================================================*/
+create table type
+(
+   Book_type_id         int not null,
+   Bo_shelf_id          int not null,
+   Book_type_name       char(255) not null,
+   primary key (Book_type_id)
+);
+
+/*==============================================================*/
+/* Table: 借书                                                    */
+/*==============================================================*/
+create table 借书
+(
+   borr_num             int not null,
+   book_id              int not null,
+   primary key (borr_num, book_id)
+);
+
+/*==============================================================*/
+/* Table: 入库                                                    */
+/*==============================================================*/
+create table 入库
+(
+   Re_book              int not null,
+   Li_num               int not null,
+   primary key (Re_book, Li_num)
+);
+
+/*==============================================================*/
+/* Table: 分类                                                    */
+/*==============================================================*/
+create table 分类
+(
+   book_id              int not null,
+   Book_type_id         int not null,
+   primary key (book_id, Book_type_id)
+);
+
+alter table Book add constraint FK_管理 foreign key (Li_num)
+      references Librarian (Li_num) on delete restrict on update restrict;
+
+alter table Bookshelf add constraint FK_包含 foreign key (Fl_num)
+      references Floor (Fl_num) on delete restrict on update restrict;
+
+alter table Floor add constraint FK_包括 foreign key (Lib_num)
+      references Library (Lib_num) on delete restrict on update restrict;
+
+alter table type add constraint FK_下级 foreign key (Bo_shelf_id)
+      references Bookshelf (Bo_shelf_id) on delete restrict on update restrict;
+
+alter table 借书 add constraint FK_借书 foreign key (borr_num)
+      references borrower (borr_num) on delete restrict on update restrict;
+
+alter table 借书 add constraint FK_借书2 foreign key (book_id)
+      references Book (book_id) on delete restrict on update restrict;
+
+alter table 入库 add constraint FK_入库 foreign key (Re_book)
+      references Return_book (Re_book) on delete restrict on update restrict;
+
+alter table 入库 add constraint FK_入库2 foreign key (Li_num)
+      references Librarian (Li_num) on delete restrict on update restrict;
+
+alter table 分类 add constraint FK_分类 foreign key (book_id)
+      references Book (book_id) on delete restrict on update restrict;
+
+alter table 分类 add constraint FK_分类2 foreign key (Book_type_id)
+      references type (Book_type_id) on delete restrict on update restrict;
+
+
+```
\ No newline at end of file