MySQL设计工厂管理数据库（Ⅰ）—表结构设计

引言

学习MyQL第5天，主要在学习其的基础的操作知识，想通过实例练习巩固所学，遂成此文。

设计思路

工厂管理E-R图

由图易知:该数据库主要包括五个主体：
1、项目（project）
2、供应商（supplier）
3、仓库（storehouse）
4、零件（components）
5、职工（staff）

设计工厂管理逻辑图

根据E-R图要求，笔者尝试设计的逻辑图如下图所示：

实现过程

实现工具为MySQL，编辑工具为Navicat for MySQL

项目（project）表实现

CREATE TABLE `project`  (
  `Supplier_supply` int(10) NOT NULL COMMENT '供应量',
  `project_ID` varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '项目号',
  `budget` int(10) NOT NULL COMMENT '预算',
  `start_date` datetime(0) NOT NULL COMMENT '开工日期',
  PRIMARY KEY (`project_ID`) USING BTREE,
  INDEX `supply`(`Supplier_supply`) USING BTREE,
  CONSTRAINT `Supplier_supply` FOREIGN KEY (`Supplier_supply`) REFERENCES `supplier` (`supply`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

职工（staff）表设计

CREATE TABLE `staff`  (
  `staff_ID` char(11) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '职工号',
  `staff_name` varchar(15) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '职工姓名',
  `age` int(3) NOT NULL COMMENT '年龄',
  `job_title` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '职称',
  `Whether_to_lead` enum('yes','no') CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '是否领导',
  `storehouse_ID` char(11) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL COMMENT '所在仓库',
  PRIMARY KEY (`staff_ID`) USING BTREE,
  INDEX `storehouse_ID`(`storehouse_ID`) USING BTREE,
  CONSTRAINT `storehouse_ID` FOREIGN KEY (`storehouse_ID`) REFERENCES `storehouse` (`storehouse_ID`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

零件（components）表设计

CREATE TABLE `components`  (
  `component_ID` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '零件号',
  `comonent_name` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '零件名称',
  `specification` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '规格',
  `unit_price` decimal(10, 2) NOT NULL COMMENT '单价',
  `inventory` int(25) NOT NULL COMMENT '库存量',
  `description` varchar(15) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '描述',
  PRIMARY KEY (`component_ID`, `inventory`) USING BTREE,
  INDEX `inventory`(`inventory`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

供应商（supplier）表设计

CREATE TABLE `supplier`  (
  `supplier_ID` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '供应商号',
  `name` varchar(15) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '姓名',
  `address` varchar(25) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '地址',
  `telephone_number` char(11) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '电话号码',
  `account_number` char(22) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT '账号',
  `supply` int(10) NOT NULL COMMENT '供应量',
  PRIMARY KEY (`supplier_ID`, `supply`) USING BTREE,
  INDEX `supply`(`supply`) USING BTREE
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

仓库（storehouse）表设计

CREATE TABLE `storehouse`  (
  `storehouse_ID` char(11) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '仓库号',
  `area` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '面积',
  `s_telephone_number` varchar(11) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL COMMENT '电话号码',
  `component_stock` int(10) NOT NULL COMMENT '零件库存',
  PRIMARY KEY (`storehouse_ID`) USING BTREE,
  INDEX `component_stock`(`component_stock`) USING BTREE,
  CONSTRAINT `component_stock` FOREIGN KEY (`component_stock`) REFERENCES `components` (`inventory`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

实现效果

小结

笔者在逻辑结构设计上仍有欠缺，望读者不吝赐教，给笔者一些改进建议。另外，在表中各变量的数据类型的赋予上，仍有不足之处。

参考

编程规则主要来自:
《MySQL必知必会》章节1-12
慕课《MySQL数据库设计与应用》