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	<title>Fresker小站 &#187; Mysql</title>
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	<description>天将降大任于斯人也，必先苦其心志，劳其筋骨，饿其体肤，空乏其身....</description>
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		<title>安装mysql5.5</title>
		<link>http://www.fresker.com/old2/archives/468</link>
		<comments>http://www.fresker.com/old2/archives/468#comments</comments>
		<pubDate>Thu, 08 Mar 2012 07:08:48 +0000</pubDate>
		<dc:creator>Duke</dc:creator>
				<category><![CDATA[Mysql]]></category>
		<category><![CDATA[开发技术类]]></category>
		<category><![CDATA[技术杂谈]]></category>
		<category><![CDATA[教程类]]></category>
		<category><![CDATA[其他工具]]></category>

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		<description><![CDATA[Ps: 此文档记录安装mysql5.5.21的步骤，留待参考 &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Mysql安装在独立的位置/usr/local/mysql 安装环境：virtualbox中redhat(rhel6.0) 安装方式：源码方式 步骤： &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; 创建目录/usr/local/mysql &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; mkdir –p /usr/local/mysql &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; 添加启动mysql的用户/用户组 &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; groupadd mysql &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; useradd –g mysql mysql&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; //mysql添加到mysql组中 &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; 解压安装包 &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; tar zxvf mysql-5.5.21.tar.gz -C /usr/local/ &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; cd /usr/local/ &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; ln -s mysql-5.5.21 mysql &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; ps:&#160;&#160;&#160; centos默认未安装gcc,这导致后面的编译无法通过，若你也使用默认方式，请先安装gcc &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;&#160; &#160;&#160; 检查是否安装gcc&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; rpm –qa&#124;grep gcc &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; &#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; Mysql5.5后通过cmake来编译，所以需要下载安装 [...]]]></description>
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		<title>mysql优化工作学习笔记</title>
		<link>http://www.fresker.com/old2/archives/400</link>
		<comments>http://www.fresker.com/old2/archives/400#comments</comments>
		<pubDate>Fri, 22 Jul 2011 07:04:58 +0000</pubDate>
		<dc:creator>Duke</dc:creator>
				<category><![CDATA[MySQL管理工具]]></category>
		<category><![CDATA[Mysql]]></category>
		<category><![CDATA[开发工具]]></category>
		<category><![CDATA[开发技术类]]></category>
		<category><![CDATA[教程类]]></category>
		<category><![CDATA[DataBase]]></category>

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		<description><![CDATA[mysql优化工作学习笔记 mysql -r -u xxx -p&#160;&#160;&#160;&#160;进入 show databases;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;显示数据库 use databases;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;切换数据库 show tables;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;显示数据表 explain select * from test; explain select * from test where &#8220;id=1&#8243;; &#160; explain查询出来结果使用意义（key查询方式，是否基于索引，extra查询方式，是否使用索引，临时表，排序） &#160;&#160;&#160;&#160;key: This column defi nes the index that is used for the given table. By default, MySQL usesonly one index per table. There are a small number of exceptions; [...]]]></description>
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		<title>Mysql学习笔记</title>
		<link>http://www.fresker.com/old2/archives/288</link>
		<comments>http://www.fresker.com/old2/archives/288#comments</comments>
		<pubDate>Fri, 12 Nov 2010 03:45:59 +0000</pubDate>
		<dc:creator>Duke</dc:creator>
				<category><![CDATA[Mysql]]></category>
		<category><![CDATA[开发技术类]]></category>
		<category><![CDATA[技术杂谈]]></category>
		<category><![CDATA[DataBase]]></category>

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		<description><![CDATA[更新表的存储引擎： ALTER TABLE tb TYPE=MYISAM/INNODB 创建表时最好确认表不存在： CREATE TABLE IF NOT EXISTS 在数据表优化查询时，常用到临时表 可用CREATE TEMPORARY TABLE 来创建临时表，这些表在会话结束时会自动消失，使用临时表不必费心发布drop table 语句明确删除这些表 可利用select来创建一个表 CREATE TABLE new_tb SELECT * FROM tb; 添加索引方法： ALTER TABLE tb_name ADD INDEX index_name (column_list); ALTER TABLE tb_name ADD UMIQUE index_name (column_list); ALTER TABLE tb_name ADD PRIMARY KEY (column_list); or CREATE UNIQUE INDEX index_name ON tb_name(column_list); [...]]]></description>
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		<item>
		<title>fetch_row,fetch_assoc,fetch_object区别</title>
		<link>http://www.fresker.com/old2/archives/271</link>
		<comments>http://www.fresker.com/old2/archives/271#comments</comments>
		<pubDate>Tue, 12 Oct 2010 04:42:42 +0000</pubDate>
		<dc:creator>Duke</dc:creator>
				<category><![CDATA[Mysql]]></category>
		<category><![CDATA[PHP教程]]></category>
		<category><![CDATA[教程类]]></category>
		<category><![CDATA[PHP开发工具]]></category>

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		<description><![CDATA[fetch_row,fetch_assoc,fetch_object这几个是从mysql查询结果集中取得数据的函数，让我们来看看他们之间的区别，自己记录下，便于日后遗忘了好查询，下面通过一个实例开始分析: &#60;?php $link=mysql_connect(’localhost’,&#8217;root’,”); mysql_select_db(’abc’,$link); $sql = “select * from book”; $result = mysql_query($sql); while($row = mysql_fetch_row($result)) { echo $row['cid'].’::’.$row[1].’&#60;br&#62;’; } $result = mysql_query($sql); while($row = mysql_fetch_array($result)) { echo $row['cid'].’::’.$row[1].’&#60;br&#62;’; } $result = mysql_query($sql); while($row = mysql_fetch_object($result)) { echo $row-&#62;cid.’::’.$row-&#62;title.”&#60;br&#62;”; } $result = mysql_query($sql); while($row = mysql_fetch_assoc($result)) { echo $row['cid'].’::’.$row[1].’&#60;br&#62;’; } ?&#62; 分析： mysql_fetch_row，这个函数是从结果集中取一行作为枚举数据，从和指定的结果标识关联的结果集中取得一行数据并作为数组返回。每个结 果的列储存在一个数组的单元中，偏移量从 0 [...]]]></description>
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