<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[qi6561341的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/qi6561341</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; qi6561341]]></copyright><item><title><![CDATA[git & github 基础入门-分支]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/158650126</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/158650126</guid><author>qi6561341</author><pubDate>Wed, 04 Mar 2026 12:02:11 +0800</pubDate><description><![CDATA[接着切换至dev2，增加第3行3333，并提交合并。因此时合并的master已改变，合并时会报错。切换至分支dev1，修改内容，并提交合并至master中，并删除dev1。master主路进行新增多分支前，监控文件内容如下。新增修改第二行1改为2的分支dev1。新增增加第三行3333的分支dev2。合并后，当前master中内容为。手动调整后，在提交，生成最新版本。合并后master中内容如下。]]></description><category></category></item><item><title><![CDATA[git & github基础入门--初始化版本控制]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/158615027</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/158615027</guid><author>qi6561341</author><pubDate>Tue, 03 Mar 2026 17:26:55 +0800</pubDate><description><![CDATA[当版本回滚后，使用git log 查询就看不到被回滚的版本了。若出现版本回滚错误情况，可通过如下操作，恢复版本。配置个人信息：用户名、邮箱。管理指定文件(红变绿)管理目录下的文件状态。]]></description><category></category></item><item><title><![CDATA[Oracle基础-集合]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140781185</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140781185</guid><author>qi6561341</author><pubDate>Mon, 29 Jul 2024 21:25:21 +0800</pubDate><description><![CDATA[集合：两个结果集的字段个数和字段类型必须相同，才能使用集合操作。]]></description><category></category></item><item><title><![CDATA[Oracle基础-SQL99标准的表连接方法]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140779990</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140779990</guid><author>qi6561341</author><pubDate>Mon, 29 Jul 2024 20:56:55 +0800</pubDate><description><![CDATA[【代码】Oracle基础-SQL99标准的表连接方法。]]></description><category></category></item><item><title><![CDATA[Oracle基础-SQL92标准下的笛卡尔积、内连接(等值连接、非等值连接)、外连接和自连接]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140757030</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140757030</guid><author>qi6561341</author><pubDate>Sun, 28 Jul 2024 22:24:18 +0800</pubDate><description><![CDATA[外连接：比如表A和表B进行外连接，就需要有一张作为主表，另外一张则需要作为从表。主表中的内容全都在，从表只有相关联的在。表后面有"(+)"的就是从表。笛卡尔积：说人话就是，A表有5条记录，B表右6条记录，笛卡尔积后的临时表中有3*4=12条记录，没有任何条件去约束。内连接：表A和表B有关联的数据组合在一起，无关联的不会出现在查询结果集中。等值连接：A表和B表，通过一个意义和内容都相等的字段关联起来。非等值连接：表A的一个字段中确定值在表B的两个字段的范围内。]]></description><category></category></item><item><title><![CDATA[Oracle基础-having过滤分组]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140407239</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140407239</guid><author>qi6561341</author><pubDate>Sat, 13 Jul 2024 21:59:35 +0800</pubDate><description><![CDATA[注意：having与where 的区别:having针对组信息的过滤，没有分组就不能使用having；where 是针对行信息的筛选，没有前置要求。]]></description><category></category></item><item><title><![CDATA[Oracle基础-group by 分组]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140406819</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140406819</guid><author>qi6561341</author><pubDate>Sat, 13 Jul 2024 21:49:14 +0800</pubDate><description><![CDATA[注意：select 后面可以查到的字段只能是。查询其他字段会报异常。"被函数修饰后的字段""分组所依据的字段"]]></description><category></category></item><item><title><![CDATA[Oracle基础-转换函数]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140405828</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140405828</guid><author>qi6561341</author><pubDate>Sat, 13 Jul 2024 20:43:28 +0800</pubDate><description><![CDATA[【代码】Oracle基础-转换函数。]]></description><category></category></item><item><title><![CDATA[Oracle基础-日期函数]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140405470</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140405470</guid><author>qi6561341</author><pubDate>Sat, 13 Jul 2024 20:23:21 +0800</pubDate><description><![CDATA[【代码】Oracle基础-日期函数。]]></description><category></category></item><item><title><![CDATA[Oracle基础-常见字符函数]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140363707</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140363707</guid><author>qi6561341</author><pubDate>Thu, 11 Jul 2024 22:53:06 +0800</pubDate><description><![CDATA[【代码】Oracle基础-常见字符函数。]]></description><category></category></item><item><title><![CDATA[Oracle基础-“||“拼接字段]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140336384</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140336384</guid><author>qi6561341</author><pubDate>Wed, 10 Jul 2024 23:13:13 +0800</pubDate><description><![CDATA[concat(a,b）：最多联合两个字段。]]></description><category></category></item><item><title><![CDATA[Oracle基础-NVL()的使用]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140336132</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140336132</guid><author>qi6561341</author><pubDate>Wed, 10 Jul 2024 22:38:33 +0800</pubDate><description><![CDATA[NVL(A,B)：当A为null时，返回B，否则返回A。]]></description><category></category></item><item><title><![CDATA[Oracle基础-单排序和多排序]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140335985</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140335985</guid><author>qi6561341</author><pubDate>Wed, 10 Jul 2024 22:36:29 +0800</pubDate><description><![CDATA[【代码】Oracle基础-单排序和多排序。]]></description><category></category></item><item><title><![CDATA[Oracle基础-表的增删改查]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140334194</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140334194</guid><author>qi6561341</author><pubDate>Wed, 10 Jul 2024 21:11:28 +0800</pubDate><description><![CDATA[【代码】Oracle基础-表的增删改查。]]></description><category></category></item><item><title><![CDATA[Oracle基础-创建表空间和创建用户关联表空间]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/140306919</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/140306919</guid><author>qi6561341</author><pubDate>Tue, 09 Jul 2024 21:29:26 +0800</pubDate><description><![CDATA[拥有connect role 的用户还能够创建表、视图、序列（sequence）、簇（cluster）、同义词(synonym)、回话（session）和其他数据的链（link)。resource提供给用户另外的权限以创建他们自己的表、序列、过程(procedure)、触发器(trigger)、索引(index)和簇(cluster)。connect是使用oracle简单权限，这种权限只对其他用户的表有访问权限，包括select/insert/update和delete等。]]></description><category></category></item><item><title><![CDATA[基于C#+WinForm+Ado.net门诊医生工作站的设计与实现]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/138976389</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/138976389</guid><author>qi6561341</author><pubDate>Thu, 16 May 2024 22:05:55 +0800</pubDate><description><![CDATA[SQLServer;程序完全个人开发，如有需要，可附赠一份优秀毕业论文，自己修改降重。]]></description><category></category></item><item><title><![CDATA[C#基础-飞行棋项目练习]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/138685104</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/138685104</guid><author>qi6561341</author><pubDate>Fri, 10 May 2024 22:52:01 +0800</pubDate><description><![CDATA[【代码】C#基础-飞行棋项目练习。]]></description><category></category></item><item><title><![CDATA[C#基础-暂停、睡眠和清除]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/138644661</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/138644661</guid><author>qi6561341</author><pubDate>Fri, 10 May 2024 07:23:09 +0800</pubDate><description><![CDATA[【代码】C#基础-暂停和睡眠。]]></description><category></category></item><item><title><![CDATA[C#基础-更改输出结果的背景色和前景色（字体颜色）]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/138629128</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/138629128</guid><author>qi6561341</author><pubDate>Thu, 09 May 2024 19:56:43 +0800</pubDate><description><![CDATA[【代码】C#基础-更改输出结果的背景色和前景色（字体颜色）]]></description><category></category></item><item><title><![CDATA[C#基础-递归]]></title><link>https://blog.youkuaiyun.com/qi6561341/article/details/138595600</link><guid>https://blog.youkuaiyun.com/qi6561341/article/details/138595600</guid><author>qi6561341</author><pubDate>Thu, 09 May 2024 07:56:24 +0800</pubDate><description><![CDATA[练习：使用递归解决斐波那契数列，返回输入的数在斐波那契数列中的值。斐波那契数列除去前两个数，从第3个数开始为前两数之和，如1，1，2，3，5，8...递归：方法调用方法，需设置结束点。]]></description><category></category></item></channel></rss>