<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[]]></title><description><![CDATA[济南软件开发]]></description><link>https://blog.youkuaiyun.com/jinyanzeng</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; jinyanzeng]]></copyright><item><title><![CDATA[索引的类型]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/118344100</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/118344100</guid><author>jinyanzeng</author><pubDate>Tue, 29 Jun 2021 21:13:38 +0800</pubDate><description><![CDATA[索引的类型
1、普通索引
这是最基本的索引，它没有任何限制，比如上文中为title字段创建的索引就是一个普通索引，MyIASM中默认的BTREE类型的索引，也是我们大多数情况下用到的索引。
创建方式：

直接创建索引
CREATE INDEX index_name ON table(column(length))
1
修改表结构的方式添加索引
ALTER TABLE table_name ADD INDEX index_name ON (column(length))
1
创建表的时候同时创建索引
CREA]]></description><category></category></item><item><title><![CDATA[mysql  update 加法运算 字段累加]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/110878986</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/110878986</guid><author>jinyanzeng</author><pubDate>Tue, 08 Dec 2020 18:15:00 +0800</pubDate><description><![CDATA[UPDATE table SET column = column+ num;
]]></description><category></category></item><item><title><![CDATA[python环境安装]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/110548541</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/110548541</guid><author>jinyanzeng</author><pubDate>Thu, 03 Dec 2020 17:06:43 +0800</pubDate><description><![CDATA[https://www.bilibili.com/video/BV1vf4y1q7qg/



安装包 网盘里搜 python环境包

链接: https://pan.baidu.com/s/1-0Hb9PYHtns3zu5w9lcP2g 提取码: xuba 复制这段内容后打开百度网盘手机App，操作更方便哦
--来自百度网盘超级会员v2的分享

...]]></description><category></category></item><item><title><![CDATA[anaconda安装详解]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/110546025</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/110546025</guid><author>jinyanzeng</author><pubDate>Thu, 03 Dec 2020 16:38:22 +0800</pubDate><description><![CDATA[目录


	01 anaconda安装
		
		开始安装
		
		02 配置anaconda
		
		配置环境变量
			配置国内镜像
			创建虚拟环境
			虚拟环境的切换
			虚拟环境卸载
		
		03 第三方包的管理
		
		包安装
			
			在默认的Python环境下安装包
				在虚拟Python环境下安装包
			
			包卸载
		
		04 拓展
		
		anaconda相关
			jupyter notebook相关
			CUDA相关
			Pytorch相关
		]]></description><category></category></item><item><title><![CDATA[Python 设置解释器]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/110543083</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/110543083</guid><author>jinyanzeng</author><pubDate>Thu, 03 Dec 2020 16:26:29 +0800</pubDate><description><![CDATA[打开设置

文件—》首选项——》设置


搜索python.pythonPath


可以看到现在的解释器是:默认的”python”，然后在右侧的用户设置中改为自己的解释器，覆盖默认的。



这样就可以了，各种函数和关键字就可以找到库中的定义了。
...]]></description><category></category></item><item><title><![CDATA[mysql存在更新不存在新增]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/105407779</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/105407779</guid><author>jinyanzeng</author><pubDate>Thu, 09 Apr 2020 12:23:34 +0800</pubDate><description><![CDATA[MySQL新增数据，存在就更新，不存在就添加

1、插入一条数据，存在就更新，不存在就更新（必须现有唯一键）
使用insert ignore语句：


insert ignore into table(col1,col2) values ('a','b');  



例如插入数据：


insert ignore into user_info (last_name,first_name) va...]]></description><category></category></item><item><title><![CDATA[MySQL之——查询重复记录、删除重复记录方法大全]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/98749326</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/98749326</guid><author>jinyanzeng</author><pubDate>Wed, 07 Aug 2019 15:06:51 +0800</pubDate><description><![CDATA[SELECT * FROM t_info a WHERE ((SELECT COUNT(*) FROM t_info WHERE Title = a.Title) &gt; 1) ORDER BY Title DESC
一、查找重复记录
1、查找全部重复记录
Select * From 表 Where 重复字段 In (Select 重复字段 From 表 Group By 重复字段 Having...]]></description><category></category></item><item><title><![CDATA[Chrome断点JS寻找淘宝签名sign]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/90609926</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/90609926</guid><author>jinyanzeng</author><pubDate>Mon, 27 May 2019 19:16:12 +0800</pubDate><description><![CDATA[写了这篇文章淘宝sign加密算法 之后，很多人问我Chrome断点调试怎么做，今天会尽量详细聊聊。如果你用使用过Pycharm的断点，会更好理解。

文章中图片很多，如果看不清楚，可以在阅读原文中打开看我的博客。

我们还是以淘宝为例，使用Chrome的移动请求头打开这个网站，https://s.m.taobao.com/h5?q=%E9%9E%8B%E6%9E%B6，然后打开开发者工具。



...]]></description><category></category></item><item><title><![CDATA[帝国cms循环子栏目导航]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573879</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573879</guid><author>jinyanzeng</author><pubDate>Sat, 20 Jun 2015 15:36:07 +0800</pubDate><description><![CDATA[//bclassid='66'这个66可以设置为0就是调用根目录

[e:loop={"select classid,classname,islast from {$dbtbpre}enewsclass where bclassid='66' order by myorder,classid ASC limit 11",0,24,0}]
<?php
$classurl=sys_ReturnBq]]></description><category></category></item><item><title><![CDATA[帝国cms循环子栏目 调用子栏目文章]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573735</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573735</guid><author>jinyanzeng</author><pubDate>Sat, 20 Jun 2015 15:14:12 +0800</pubDate><description><![CDATA[http://www.jb51.net/cms/188229.html
<?php
$bclassid=$GLOBALS[navclassid]; //取得本栏目id
//取得本栏目下的子栏目
?>
[e:loop={"select classid, classname, classpath from `[!db.pre!]enewsclass` where bclassid='$bclassi]]></description><category></category></item><item><title><![CDATA[帝国ECMS6.5灵动标签汇集]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573679</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573679</guid><author>jinyanzeng</author><pubDate>Sat, 20 Jun 2015 15:06:37 +0800</pubDate><description><![CDATA[0、先来标准的loop灵动标签说明
[e:loop={栏目ID/专题ID,显示条数,操作类型,只显示有标题图片,附加SQL条件,显示排序}]
1、调用相同作者发布的信息
[e:loop={"news",5,18,0,"userid='".$navinfor[userid]."' and ismember=1",""}]
2、调用相同标题分类的信息
[e:loop={"selfinfo",5,0,0]]></description><category></category></item><item><title><![CDATA[正则匹配多个空格 换行]]></title><link>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573433</link><guid>https://blog.youkuaiyun.com/jinyanzeng/article/details/46573433</guid><author>jinyanzeng</author><pubDate>Sat, 20 Jun 2015 14:05:04 +0800</pubDate><description><![CDATA[.版本 2 
.支持库 RegEx正则表达式.创建 (“(\s+\r)+”, 假) 
返回内容 ＝ 正则表达式.替换 (返回内容, “”, 1, , 真, 真) 
’ 正则表达式.创建 (“\r”, 假) 
’ 返回内容 ＝ 正则表达式.替换 (返回内容, “”, 1, , 真, 真)]]></description><category></category></item></channel></rss>