<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[defendxx的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/defendxx</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; defendxx]]></copyright><item><title><![CDATA[mysql数据库聚合函数的学习和实体完整性的思考]]></title><link>https://blog.youkuaiyun.com/defendxx/article/details/137927938</link><guid>https://blog.youkuaiyun.com/defendxx/article/details/137927938</guid><author>defendxx</author><pubDate>Thu, 18 Apr 2024 17:52:06 +0800</pubDate><description><![CDATA[聚合函数：count()#返回某列的行数、sum()#返回某列值的和、avg()#返回某列的平均值、max()#返回某列的最大值、min()#返回某列的最小值。]]></description><category></category></item><item><title><![CDATA[MySQL数据库单表查询学习以及心得体会]]></title><link>https://blog.youkuaiyun.com/defendxx/article/details/137788392</link><guid>https://blog.youkuaiyun.com/defendxx/article/details/137788392</guid><author>defendxx</author><pubDate>Mon, 15 Apr 2024 17:39:45 +0800</pubDate><description><![CDATA[MySQL数据库单表查询的学习与思考]]></description><category></category></item><item><title><![CDATA[mysql数据库表内操作，增、删、改。]]></title><link>https://blog.youkuaiyun.com/defendxx/article/details/137720206</link><guid>https://blog.youkuaiyun.com/defendxx/article/details/137720206</guid><author>defendxx</author><pubDate>Sat, 13 Apr 2024 17:47:25 +0800</pubDate><description><![CDATA[对数据库mysql的建表增、删、改初步语法的学习。]]></description><category></category></item><item><title><![CDATA[数据库的创建，表的创建与删除，表内字段的创建与修改，以及部分SQL语句的类型分类]]></title><link>https://blog.youkuaiyun.com/defendxx/article/details/137688956</link><guid>https://blog.youkuaiyun.com/defendxx/article/details/137688956</guid><author>defendxx</author><pubDate>Fri, 12 Apr 2024 17:45:53 +0800</pubDate><description><![CDATA[对数据库的创建，表的创建，相关字段的修改进行注释和学习。]]></description><category></category></item><item><title><![CDATA[复盘学习mysql的登陆命令和如何使用终端命令打开visual studio code的html页面]]></title><link>https://blog.youkuaiyun.com/defendxx/article/details/137646597</link><guid>https://blog.youkuaiyun.com/defendxx/article/details/137646597</guid><author>defendxx</author><pubDate>Thu, 11 Apr 2024 18:08:32 +0800</pubDate><description><![CDATA[通过对mysql的SQL语句的学习熟悉建库、增删改查等操作。利于Visual studio code软件加深对python语句的学习，和对网站设计前端的学习。勤做笔记，如有忘记，可及时前来查看。最近会加深对MySQL数据库的复习与学习，以及对visual studio code软件的深入了解，复习之前编写的python语言，希望会有新的收获。]]></description><category></category></item></channel></rss>