如何使用CONCAT_WS代替全文搜索

Question

MySQL

+----+-------------------+----------+--------------+
| id | address           | city     | state        |      
+----+-------------------+----------+--------------+
| 1  | 13000 highway 244 | keystone | south dakota |
+----+-------------------+----------+--------------+

(btw, I left out some columns to make it easier)

PHP

$string = mysql_real_escape_string('13000 highway 244 south dakota');

$a = mysql_query("

    SELECT * FROM `table` WHERE

    CONCAT_WS(' ', `address`, `city`, `state`) LIKE '%$string%'

");

The above search query doesn't return any results, only the following values would work:

• 13000 highway 244 keystone south dakota
• 13000 highway 244 keystone
• keystone south dakota

However, I also want to get the following values to work:

• 13000 highway 244 south dakota
• 13000 highway keystone
• south dakota highway keystone
• etc.

Is that even possible without relying on full-text search ?

Answer 1

Why not do it code more explicitly like this?

$address = mysql_real_escape_string('13000 highway 244');
$city = mysql_real_escape_string('keystone');
$state = mysql_real_escape_string('south dakota');

$a = mysql_query( '

    SELECT * 
      FROM `table` 
     WHERE (   ( address = ' . $address . ' )
           AND ( city    = ' . $city    . ' )
           AND ( state   = ' . $state   . ' )
           )
        OR ( state   = ' . $state   . ' )
             .. probably more alternatives ...
');

Answer 2

在传递字符串以进行查询之前，用通配符替换空格，因此即使“ 130 dakoda”也可以工作

$string = str_replace( array('*', '?', ' '), array('%', '_', '%'), $string); //Change norm wildcards to mysql format and replace spaces with wildcards