学习笔记数据库数据表的相关内容

文章 2023-04-21 来自：开发者社区

【MySQL学习笔记】数据库/数据表的创建、查看、选择与修改

MySQL数据库原理哈喽大家好~这里是MYSQL数据库原理学习笔记专栏第二期本期内容——数据库/数据表的创建、查看、选择与修改上期内容——数据库基础知识欢迎大佬指正，一起学习，一起加油~前言在MySQL数据库的学习中，数据库、数据表和数据的操作，不仅仅是必须掌握的内容，也是学习后续的基础噢~本期主要内容为：数据库的创建、查看、选择与删除数据表的创建、查看、选择与删除一、数据库操作1、创建数据库M....

文章 2014-03-12 来自：开发者社区

Laravel学习笔记（五）数据库数据库迁移案例2——创建数据结构，数据表，修改数据结构

默认假设所有的列在定义的时候都有默认的假设，你可以根据需要重写。 Laravel假定每个表都有一个数值型的主键（通常命名为”id”），确保新加入的每一行都是唯一的。Laravel只有在每个表都有数值型主键时才会正常运行。所以，对于每一个Laravel应用，都要确保定义的主键使用的是increments()方法。列在默认情况下为NOT NULL。现在，让我们一行行分析结构生成器生成的au...

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