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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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数据可视化在过去几年中取得了巨大进展。开发人员对可视化产品的期望不再是简单的图表创建工具，而是在交互、性能、数据处理等方面有更高的要求。
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                        <h1 class="page-title"><a href="/show-203690267.html" title="RHCE 学习笔记（36) - MariaDB">RHCE 学习笔记（36) - MariaDB</a></h1>
            
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                <time class="post-date" datetime="2021-07-11">2021-07-11</time>
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<div class="CopyrightStatement lh22" style="border:1px dashed rgb(213,213,213);line-height:22px;color:rgb(85,85,85);font-family:'宋体', 'Arial Narrow', arial, serif;font-size:12px;">原创作品，允许转载，转载时请务必以超链接形式标明文章 <a href="http://beanxyz.blog.51cto.com/5570417/1609972" rel="nofollow" style="color:rgb(131,13,3);" target="_blank">原始出处</a> 、作者信息和本声明。否则将追究法律责任。<a href="http://beanxyz.blog.51cto.com/5570417/1609972" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank">http://beanxyz.blog.51cto.com/5570417/1609972</a>
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<p style="clear:both;">MariaDB 是MySQL的一个分支，从MySQL被甲骨文收购之后才弄出来的替代品，目前全部兼容MySQL。<br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">RHEL7里面对MariaDB的要求不高，普通的管理员不需要有专业DBA的水平，能够掌握常见的SQL命令，可以对用户管理和备份还原数据库进行了。</p>
<p style="clear:both;"><br></p>
<p style="clear:both;">首先安装MariaDB</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/35/wKioL1TLBxjAeALLAAGRal4mPa8938.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpRM05TOHhaVFkzTUdabU56ZzVPREV4TWpFMFlXWXdPR0k0WmpSaU1EZzVZamhtTXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">打开防火墙服务，开机自动运行</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/38/wKiom1TLBjrynRNRAAEZhcREN38562.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjME15OHdNMkU1TldZeFpEbGxaVE5oWkdRd1pUYzFOR1pqTW1RM1ltWTNOVGxtWmk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">可以开始用了，先看看基本的命令操作，SQL操作无非增删改查询，触发器，存储过程等等，RHCE7毕竟不是专门的MariaDB课程，知道最基本的就够了；</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/35/wKioL1TLByGSp0UXAACP9Tnuv9Y242.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpVd09DOHpNVGt6WkdNelpUYzVaVGMyTTJGbU4yTmpOVE0xWVdOa1lqTTJZMkk0TkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">显示数据库</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/38/wKiom1TLBkDCtQ-JAACW3wvd2KY441.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjeUx6ZzJabUkyTlRjMllUa3hZbVZqWVdaaU5EQTFaRGhqWlRRMlpqazNOamN3TGtwUVJVYz0=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">创建数据库</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/35/wKioL1TLByXw4w2dAADcxvvAX2E126.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNMUx6TmlNRGd3TkRRMVltTTBPRFE0TkdRNE9UUmpNRGd6WXpBd1pXSTFNekZpTGtwUVJVYz0=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">进入数据库</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/38/wKiom1TLBkThzICkAAAv1gXSOMg645.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjeU1pOWpNbVl3WW1ZNE9ESTVZVGhoTkRGbVltTTRaR1F3T0RrMU16Tm1NR1kzWVM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">创建一个表，指定主键和各字段的名字类型；</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/35/wKioL1TLByqBo6ToAACIG3NSj7g324.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THprM05TOWxObVppWkRBMk5XRm1aRGxtT0RJeE9XVmlZMkl3T1RsaE9EZ3dZVFJtTnk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">插入数据</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/38/wKiom1TLBknzB8V7AACqqbtNtiE572.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjM01TOHhZekEyWVRabU5EQTVNell3WkRReU0yTm1ZbUprT0RkbFpUbGlZMkUwWWk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">查询数据</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/35/wKioL1TLBy3jYL_yAACq3f8AStA078.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpFeE5pOHpZVFEwTUdNNU9HUTFNREZpWldZeVpqTXpZakUxT0RVM1ltRTNNR1V4TkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">更新数据</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/38/wKiom1TLBk6CmONvAAE486W_GS4568.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THprM09TOWxNV1k1TlRZMk5XVTBObUk0TWpnMk9EUXdaR1F3TnpBek5EZGpOekl4TXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">复制一张表</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/35/wKioL1TLBzWg4K51AAESWaMil-Q782.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNME5DODRPRE5pTXpneVpUVmlNek15T1dJd1pEY3hNelEyTkRkaU5XVXdNR0ZrTUM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">更改表的结构，增加一个字段</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/38/wKiom1TLBljRi2LLAAFVZ0-Mzi8736.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNNU5pOHlaRE5sTmprNU5EWXlOR1V3T1RVMVpEVTVaamsyTm1aak1ETmtOV1UzTkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">删除表</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/35/wKioL1TLBz_iL9UuAACZKjpT2Bk137.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THprMU5DOWpORGRrTTJWak1qQXlOemhrWm1Vek5USTVNbVk0T1RkbFlqUXhZakV4WVM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">创建另外一张表，和第一张表绑定主键外键，级联删除</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/38/wKiom1TLBl_xwFsiAACMUVRV3tU801.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpnM01DOWpZMkUxWldRek1qRmhOamt6Wm1RMk56a3hNRGhsT0RBMU5qWTVOMlkzWlM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;">插入数据</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/35/wKioL1TLB0fgs4msAAD9D9lGlmE690.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpZek9TOHhaVFExTmpVNU9XVXhNakV5TURsa1pETmpZbUV6T0RVM01tWmlOakF6Wmk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">做个简单的多表查询</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/38/wKiom1TLBmjyIQi0AADRae-UHts503.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpRd01pOWtPVEE1TkRRM05tVTBNVEUyWlRjMlpURXlNamszWVRVMVl6YzFPVGs0TWk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">从主表里面删除一行数据</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/35/wKioL1TLB0yB9lrmAABN1XvJZF4160.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJek1DOWtZakl4WXpCak5qZGxNV1JsWVdSak5EY3hNbUprWTJVNFkySmtOekk0WlM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;">确认级联删除有效</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/38/wKiom1TLBmuxGjfFAAEDyWdfBFg927.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THprek5TOHdOams0Tm1FeU9HUXpOR1l6WVdabFltWTBNRGt3T1RnNU9XRTBaakV6Tnk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">基本的SQL 命令还有很多，这里就不一一赘述，更多例子可以参考官方的文档</p>
<p style="clear:both;"><a href="https://mariadb.com/kb/en/mariadb/basic-sql-statements/" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank">https://mariadb.com/kb/en/mariadb/basic-sql-statements/</a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">下面看看第二个重点，如何对用户进行管理。</p>
<p style="clear:both;"><br></p>
<p style="clear:both;">MariaDB装好以后，默认登录是没密码的，默认登录用户的<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c3b1acacb783afaca0a2afabacb0b7" target="_blank" rel="nofollow">[email protected]</a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/36/wKioL1TLFiyjHWj8AABhvZ6sqAg533.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjeU5DOWtaVFkxWXpnME5HTTBNbVF5T1RVM1ltWm1NRFptTURjeFpHVTVaVGczTkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">查看一下mysql数据库里面的user表</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/36/wKioL1TLFjPTzid0AAETY8arIaU924.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJM015ODNabVF4WW1VelpEUmlOamswTkRZMk1ETmtObVExWkRjMU5EZzRNVFU1TVM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">所有的用户信息都在这个表里</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/39/wKiom1TLFVaDV7XbAAD4TDmNJAk654.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpZNU9TODVZVGN4WkdZd01qVTBNMkZrWlRsbE56WTFPV1V3TTJOaU5EQmhabUptTXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">首先看看如何修改root用户的密码，有3种方法。</p>
<p style="clear:both;"><br></p>
<p style="clear:both;">在Shell终端里面，可以用mysqladmin 直接重置密码</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/36/wKioL1TLFkXDaJWsAAFRddiGTlo634.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjd05TODFPRGM1TUdaaFpqQmtZemRqTUdaa09Ua3lNVEV6TURoalpXTTJNamt5T1M1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">在MariaDB里面，可以使用 set password重置</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/39/wKiom1TLFWmjJ-rPAAEQSjd-kaM630.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpVMk9TOW1ZV1JrWkRkbU5tVTVNelF6WXpNellURmtZalUzTjJZMU1ESTVaR0kyTVM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">也可以直接修改表，不过改完之后需要刷新</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/36/wKioL1TLFk6TP6-EAACk9w_C4y0153.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpVMk9DODBNR0V6WmpCbFlXUmhZbVE0TldRMk16RTJZV014WkRBNFlqRTFNekZoT0M1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/39/wKiom1TLFXHyxmFeAAEQpGD_5Zc825.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJMU5pOWtPVGcxWW1KbFlUaGtOR1EzT1dVeFlqWTRNekkxWTJFeFlXSm1PV0k1T0M1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">如果忘记了root密码怎么办，可以在 /etc/my.cnf文件里面直接添加一行</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/36/wKioL1TLFmOS4Mh0AAI2IzE2bP8321.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNNE9TODJaRFl3T0RBNVlqUXpZemswWldJeU16VXhaRGxsWVdSaVkyUm1aVFJtTlM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">重启服务之后，就可以直接进入了，这个时候可以通过第三种方式修改表，然后刷新的方式重置密码，然后注释掉之前的skip命令；</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/36/wKioL1TLFmyRvjmGAAD3wIIs0G4264.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJeE5DOWxNR0pqTkRsbU1UTTVOMlZqTXpGbVlXWTVaV1ZrTWpreVpUTXlNRFl5WlM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">下面看看如何创建其他用户。 </p>
<p style="clear:both;"><br></p>
<p style="clear:both;">新建一个tom，指定只能从本机登录，设置密码，以tom登录</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/39/wKiom1TLFZHwc3JdAAGXtt2xCJo248.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJNE5TOHlOakptT1dZNU1qVXhNV1kxWmpGak5qZzRNREk1TTJVM056STJaamM0WkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">进来之后没有权限</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/36/wKioL1TLFnqgme39AAEZDSe6Kfc874.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpnek1pOHdPREprTkRNd04yWTVNMlpqWmpFNVptSTROR1V6TXpnMk9XRTNZelUyTUM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">查看一下这个用户的权限</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/39/wKiom1TLFZzQG6hPAAFReOoFSn8711.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjeE1TOW1OV1JpTVRReE16STBNRGd5TmpGbVptWmlPR1l4Wm1JeU16a3laR016Wmk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">所有的权限类型可以通过show priviledges\G 显示</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/36/wKioL1TLFovTtCzjAAJOVhn22aE987.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNeU9DOHlZekkzWVdabVlUa3hOV0ZqWTJJMU1qY3pNR0UzWmpNNFkySmlPVFE0TUM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">手动给tom分配一个查询权限</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/39/wKiom1TLFauTGPUsAABSYJdEAIk821.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJd015OW1ZVEJpTkdZME5qSTVZelU0TkRNM1pXVXdaR1kxTkdVek1qTTVPR1ppTXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">以tom登录，只能查看mydb下面的student表</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/36/wKioL1TLFpbzjzKfAAJDw_mPKWs072.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpFMU5TODROVFF3WW1FMk5XRTRPRFU1TkRnME56UTVaRGRrTVRNM09HWTNOMk0yWWk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">如果要撤销权限可以使用revoke命令</p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/39/wKiom1TLFbTAAmCGAABo1hSo2C8326.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpZM015OWpPV0ZoTkRNNU9EUXdNR1EyTjJVMFpqZGxZek00TWpBd01XWXlaRFV5TVM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">最后，看看数据库的备份和还原；</p>
<p style="clear:both;"><br></p>
<p style="clear:both;">备份分冷备和热备</p>
<p style="clear:both;">冷备份就是直接备份 /var/lib/mysql下面的数据库文件了</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/36/wKioL1TLHWTRqOhJAADIXIzsaeY042.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjeE5TOW1NekkxTkdRd1lqWmlOakkzWXpBeE56RXpOMkV5WldJd00yWmpZemcwTXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">热备可以通过 mysqldump实现，比如下面我备份了 mydb 下面的student表</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M02/59/39/wKiom1TLHIKTuQWZAACBKo8E-Ko728.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpVNU1TODJPREkyTURrNVpUTmhNek13TXpWaU5tTTJaamsxTW1FMU1tRXhOamMyTnk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">查看一下这个生成的sql文件，本质是先删除现有表，然后创建一个新的，然后插入数据</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/36/wKioL1TLHYaBiIl6AAMHC6ugLyY668.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpJM09TOHhORFl5WkRjM1l6RXpOemN3TnpNNFpEWXpObUZqWldFMk5XUmtNMll3Tnk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">对现有表做个修改，添加一行数据</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M00/59/39/wKiom1TLHKuAyAO2AAEoASxlf3g649.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpNd01TOWhNelV4T0dGbU5EQXpOekF5WmpsbU5HWXpaV1E1TmpRMU9HVmlZbU5qWkM1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">还原重定向回来</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/36/wKioL1TLHZKjhQoJAABYYYtLxOs416.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpjd01DOWtNVEkwTVRNMVpqZ3lOV1EzWVdRNU1UUmtNekJsWmpWbE1XRmhaVGN4WXk1S1VFVkg=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">数据已经恢复了</p>
<p style="clear:both;"><br></p>
<p style="clear:both;"><a href="http://s3.51cto.com/wyfs02/M01/59/39/wKiom1TLHLXAjRxiAAChsrQ_kjY125.jpg" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank"><img src="/default/index/img?u=L2RlZmF1bHQvaW5kZXgvaW1nP3U9YUhSMGNITTZMeTl3YVdGdWMyaGxiaTVqYjIwdmFXMWhaMlZ6THpFMEx6ZzFaREpsTmpnM1kyVmpNREV4TnpabU9UWTBZamt4WTJZMFkyRTJOVEJsTGtwUVJVYz0=" title="RHCE 学习笔记（36) - MariaDB" alt="RHCE 学习笔记（36) - MariaDB"></a></p>
<p style="clear:both;"><br></p>
<p style="clear:both;">本文出自 “<a href="http://beanxyz.blog.51cto.com/" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank">麻婆豆腐</a>” 博客，请务必保留此出处<a href="http://beanxyz.blog.51cto.com/5570417/1609972" rel="nofollow" style="color:rgb(131,13,3);text-decoration:none;" target="_blank">http://beanxyz.blog.51cto.com/5570417/1609972</a></p>
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