关系数据库中，一对多关系使用的非常普遍，多对多关系也时有用到，而一对一关系用的非常之少，本篇将展示一个一对一关系的使用示例。首先我们有这样一个数据库：这是一个简单的商业数据库，现在有一个需求：要求用户可以上传多个图片以展示商品、商铺、市场、品牌，那么怎么设计呢？首先想到的是为每个表追加一个附属表用于专门存储图片，那么先创建市场照片表：接着是商铺照片表：马上你就会发现这样冗余很多，...

文章 2016-05-04 来自：开发者社区

iOS开发数据库篇—SQL代码应用示例

一、使用代码的方式批量添加（导入）数据到数据库中 1.执行SQL语句在数据库中添加一条信息插入一条数据的sql语句：点击run执行语句之后，刷新数据 2.在ios项目中使用代码批量添加多行数据示例　　代码示例： 1 // 2 // main.m 3 // 01-为数据库添加多行数据 4 // 5 // Created by apple on 14-7-26. 6 // Copy...

文章 2014-07-26 来自：开发者社区

iOS开发数据库篇—SQL代码应用示例

iOS开发数据库篇—SQL代码应用示例一、使用代码的方式批量添加（导入）数据到数据库中 1.执行SQL语句在数据库中添加一条信息插入一条数据的sql语句：　　点击run执行语句之后，刷新数据 2.在ios项目中使用代码批量添加多行数据示例　　代码示例： 1 // 2 // main.m 3 // 01-为数据库添加多行数据 4 // 5 // Created by...

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