mysql - 通过 MySQL 在全文中查找单词并返回整行

Question

我要在我的内容网站上设计一个搜索网络脚本。

例如这是The mysql DB中的一个文本内容。

A senior U.S. State Department official said Yanukovych had left Kiev for Ukraine's second's largest city of Kharkiv for a meeting after Friday's peace agreement. The official, who spoke on condition of anonymity, had been on the phone with Ukraine's foreign minister.

我搜索“哈尔科夫” 所以我想得到这个结果:

...largest city of Kharkiv for a meeting after...

执行此操作的最佳方法是什么？

我试过这个:

<?php
         $_string="Kharkiv";
         $db = JFactory::getDBO();
        $query = "SELECT CONCAT(REVERSE(SUBSTRING_INDEX(REVERSE(SUBSTR(introtext,1,INSTR(introtext, ".$_string.") - 1)),' ',4)),
                             SUBSTRING_INDEX(SUBSTR(introtext,INSTR(introtext, ".$_string.")),' ',4))
       FROM #__items
       WHERE introtext LIKE '%".$_string."%'
        ";

        $db->setQuery($query);
        $rows = $db->loadObjectList();
         foreach ($rows as $item) {
          echo $item->introtext;
                } 
           ?>

introtext是item表的一个字段。

Answer 1

您可以使用以下查询:

SELECT CONCAT(
           REVERSE(SUBSTRING_INDEX(
                REVERSE(SUBSTR(
                    text,
                    1,
                    INSTR(text, 'Kharkiv') - 1
                )),
                ' ',
                4
           )),
           SUBSTRING_INDEX(
                SUBSTR(
                    text,
                    INSTR(text, 'Kharkiv')
                ),
                ' ',
                4
            )
        )
FROM table_name
WHERE text LIKE '%Kharkiv%'

4 是您需要的字数。