<tfoot id='kax6M'></tfoot>
  • <small id='kax6M'></small><noframes id='kax6M'>

      <bdo id='kax6M'></bdo><ul id='kax6M'></ul>
    <legend id='kax6M'><style id='kax6M'><dir id='kax6M'><q id='kax6M'></q></dir></style></legend>

        <i id='kax6M'><tr id='kax6M'><dt id='kax6M'><q id='kax6M'><span id='kax6M'><b id='kax6M'><form id='kax6M'><ins id='kax6M'></ins><ul id='kax6M'></ul><sub id='kax6M'></sub></form><legend id='kax6M'></legend><bdo id='kax6M'><pre id='kax6M'><center id='kax6M'></center></pre></bdo></b><th id='kax6M'></th></span></q></dt></tr></i><div id='kax6M'><tfoot id='kax6M'></tfoot><dl id='kax6M'><fieldset id='kax6M'></fieldset></dl></div>
      1. SQL函数获取字符串在列中出现的次数?

        SQL function to get count of how many times string appears in column?(SQL函数获取字符串在列中出现的次数?)

        <small id='f0Nky'></small><noframes id='f0Nky'>

          <tbody id='f0Nky'></tbody>

      2. <legend id='f0Nky'><style id='f0Nky'><dir id='f0Nky'><q id='f0Nky'></q></dir></style></legend>
        <i id='f0Nky'><tr id='f0Nky'><dt id='f0Nky'><q id='f0Nky'><span id='f0Nky'><b id='f0Nky'><form id='f0Nky'><ins id='f0Nky'></ins><ul id='f0Nky'></ul><sub id='f0Nky'></sub></form><legend id='f0Nky'></legend><bdo id='f0Nky'><pre id='f0Nky'><center id='f0Nky'></center></pre></bdo></b><th id='f0Nky'></th></span></q></dt></tr></i><div id='f0Nky'><tfoot id='f0Nky'></tfoot><dl id='f0Nky'><fieldset id='f0Nky'></fieldset></dl></div>

            • <bdo id='f0Nky'></bdo><ul id='f0Nky'></ul>

              1. <tfoot id='f0Nky'></tfoot>
                • 本文介绍了SQL函数获取字符串在列中出现的次数?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  是否有用于计算字符串在另一个字符串或列中出现的次数的 MySQL 函数?基本上我想要:

                  Is there a function for MySQL that will count the number of times a string occurs in another string or column? Basically I want:

                  SELECT
                      SUB_COUNT('my word', `my_column`) AS `match_count`
                  FROM `table`
                  

                  谢谢!

                  我需要知道字符串在 SELECT 中的每一行的列中出现多少次.

                  I need to know how many times the string appears in a column for each row in a SELECT.

                  推荐答案

                  一个明显但不可扩展的方式是这样的

                  An obvious but unscalable way is like this

                  (LENGTH(`my_column`) - LENGTH(REPLACE(`my_column`, 'my word', '')))/LENGTH('my word')
                  

                  您是否调查过全文搜索在 MySQL 中?

                  Have you investigated Full Text search in MySQL?

                  这篇关于SQL函数获取字符串在列中出现的次数?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

                  本站部分内容来源互联网,如果有图片或者内容侵犯了您的权益,请联系我们,我们会在确认后第一时间进行删除!

                  相关文档推荐

                  Maximum stored procedure, function, trigger, or view nesting level exceeded (limit 32)(超出最大存储过程、函数、触发器或视图嵌套级别(限制 32))
                  How to View Oracle Stored Procedure using SQLPlus?(如何使用 SQLPlus 查看 Oracle 存储过程?)
                  How to debug stored procedure in VS 2015?(如何在 VS 2015 中调试存储过程?)
                  Set the variable result, from query(设置变量结果,来自查询)
                  What is dynamic SQL?(什么是动态 SQL?)
                  Mysql - How to quit/exit from stored procedure(Mysql - 如何退出/退出存储过程)

                    <tbody id='fgUdC'></tbody>
                      • <tfoot id='fgUdC'></tfoot>
                      • <i id='fgUdC'><tr id='fgUdC'><dt id='fgUdC'><q id='fgUdC'><span id='fgUdC'><b id='fgUdC'><form id='fgUdC'><ins id='fgUdC'></ins><ul id='fgUdC'></ul><sub id='fgUdC'></sub></form><legend id='fgUdC'></legend><bdo id='fgUdC'><pre id='fgUdC'><center id='fgUdC'></center></pre></bdo></b><th id='fgUdC'></th></span></q></dt></tr></i><div id='fgUdC'><tfoot id='fgUdC'></tfoot><dl id='fgUdC'><fieldset id='fgUdC'></fieldset></dl></div>
                          <bdo id='fgUdC'></bdo><ul id='fgUdC'></ul>

                            <small id='fgUdC'></small><noframes id='fgUdC'>

                            <legend id='fgUdC'><style id='fgUdC'><dir id='fgUdC'><q id='fgUdC'></q></dir></style></legend>