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    <title>硬汉工作室 - 数据库</title>
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    <item>
      <title>mysql优化总结</title>
      <link>https://www.nciaer.com/thread-1671-1-1.html</link>
      <description><![CDATA[如果字段是字符串类型，即使保存的是数字，查询的时候也要加上引号，否则查询会很慢。]]></description>
      <category>数据库</category>
      <author>nciaer</author>
      <pubDate>Thu, 25 Mar 2021 02:54:21 +0000</pubDate>
    </item>
    <item>
      <title>mysql根据某个字段映射的值排序</title>
      <link>https://www.nciaer.com/thread-1634-1-1.html</link>
      <description><![CDATA[需求是这样的，我有一个表的字段是title，值是主任医师，副主任医师，主治医生，副主治医生，助理医生等等，我想根据主任医师，副主任医师，主治医生，副主治医生，助理医生这个顺序排序，用order by title desc是不行的。所以需要这些值对应一些数字，然后根据数字大小 ...]]></description>
      <category>数据库</category>
      <author>nciaer</author>
      <pubDate>Tue, 30 Jun 2020 09:49:55 +0000</pubDate>
    </item>
    <item>
      <title>mysql查询数据库里每张表的记录数</title>
      <link>https://www.nciaer.com/thread-1632-1-1.html</link>
      <description><![CDATA[有时候数据库占用过大，不知道是那张表占用过大，可以试试这个。]]></description>
      <category>数据库</category>
      <author>nciaer</author>
      <pubDate>Sun, 14 Jun 2020 01:13:17 +0000</pubDate>
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