我有这段代码可以在 MYSQL 数据库中搜索匹配的结果:

$where[] = 'p.id IN (
    SELECT adcfvc.advert_id
      FROM #__koparent_advert_specific_fields_values AS adcfvc
     WHERE adcfvc.advert_id = p.id
       AND adcfvc.field_name = ' . $db->Quote($sf_key) . '
       AND ' . $db->Quote(JString::strtolower($sf_value)) . ' = adcfvc.field_value
)';

我想将上述搜索查询从使用等号“=”运算符选择完全匹配更改为使用带有两个通配符“%adcfvc.field_value%”的“LIKE”运算符选择任何匹配结果。

换句话说:上述代码的当前作用是，当用户搜索“Hello my people”时，查询将搜索确切的词。 但是，我希望用户能够仅使用“Hello”或“people”一词进行搜索，并且他会得到包括“Hello my people”在内的所有结果。

知道无论如何我都无法更改任何数据库结构，只需修改上面的代码即可。

名为“query.php”的完整代码文件位于: http://123dizajn.com/boltours/stackex/query.txt 我无法将整个代码粘贴到此处，因为它超出了正文限制，因此将其重命名为 query.txt 只是为了便于查看。

试验#1

所以，我尝试只替换(在代码的最后):

= adcfvc.field_value

与:

LIKE %adcfvc.field_value%

没有成功:(

试验#2

我试图颠倒查找顺序并使用多个逻辑运算符:-

$where[] = 'p.id IN (
    SELECT adcfvc.advert_id
      FROM #__koparent_advert_specific_fields_values AS adcfvc
     WHERE adcfvc.advert_id = p.id
       AND adcfvc.field_name = ' . $db->Quote($sf_key) . '
       AND
         (adcfvc.field_value > ' . $db->Quote(JString::strtolower($sf_value)) . '
         OR adcfvc.field_value < ' . $db->Quote(JString::strtolower($sf_value)) . '
         OR adcfvc.field_value = ' . $db->Quote(JString::strtolower($sf_value)) . ')
)';

但这会返回所有项目，而不是搜索到的项目!

试验#3

我还尝试反转并使用 LIKE %...%:-

$where[] = 'p.id IN (
    SELECT adcfvc.advert_id
      FROM #__koparent_advert_specific_fields_values AS adcfvc
     WHERE adcfvc.advert_id = p.id
       AND adcfvc.field_name = ' . $db->Quote($sf_key) . '
       AND adcfvc.field_value LIKE %' . $db->Quote(JString::strtolower($sf_value)) . '%
)';

但这会返回一个错误:

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '%'apartment'%) GROUP BY p.id ORDER BY ap.price DESC LIMIT 0, 20' at line 12 SQL=SELECT p., p.id AS id, p.title AS title, p.street_num, p.street, p.description as description,ap.price, pr.name as priceName,usr.id as advert_user_id,countries.title as country_name,states.title as state_name,date_format(p.created, '%Y-%m-%d') as fcreated,c.title as category_title, c.id as category_id FROM b1yvu_koparent AS p LEFT JOIN b1yvu_koparent_advert_prices AS ap ON ap.advertId = p.id AND ap.advertDateRangeGroupId = 0 AND ap.priceId = p.priceUnitId LEFT JOIN b1yvu_koparent_prices AS pr ON pr.id = p.priceUnitId LEFT JOIN b1yvu_koparent_advertmid AS pm ON pm.advert_id = p.id LEFT JOIN b1yvu_koparent_usermid AS am ON am.advert_id = p.id LEFT JOIN b1yvu_koparent_users AS usr ON usr.id = am.user_id LEFT JOIN b1yvu_koparent_categories AS c ON c.id = pm.cat_id LEFT JOIN b1yvu_koparent_advert_specific_fields_values AS asfv ON asfv.advert_id = p.id LEFT JOIN b1yvu_koparent_countries AS countries ON countries.id = p.country LEFT JOIN b1yvu_koparent_states AS states ON states.id = p.locstate WHERE p.published = 1 AND p.approved = 1 AND c.published = 1 AND (p.publish_up = '0000-00-00' OR p.publish_up <= '2015-09-05') AND (p.publish_down = '0000-00-00' OR p.publish_down >= '2015-09-05') AND (c.publish_up = '0000-00-00' OR c.publish_up <= '2015-09-05') AND (c.publish_down = '0000-00-00' OR c.publish_down >= '2015-09-05') AND p.access IN (1,9) AND c.access IN (1,9) AND c.language IN ('en-GB','') AND p.language IN ('en-GB','*') AND p.id IN (SELECT adcfvc.advert_id FROM b1yvu_koparent_advert_specific_fields_values AS adcfvc WHERE adcfvc.advert_id = p.id AND adcfvc.field_name = 't4_cust_AdvertTitleEN' AND adcfvc.field_value LIKE %'apartment'%) GROUP BY p.id ORDER BY ap.price DESC LIMIT 0, 20

感谢任何帮助或建议。

最佳答案

首先它是 quote 而不是 Quote。 其次，您应该使用 quoteName() 作为字段名称。 第三，没有理由仅仅因为你有一个子查询就停止使用 API。 此外，您的代码对于哪个是字段名称以及哪个是值非常困惑。我假设 $sf_value 代表您尝试匹配的值，adcfvc.field 是存储您尝试匹配的数据的字段的名称。

替换

 AND ' . $db->Quote(JString::strtolower($sf_value)) . ' = adcfvc.field_value

与

 AND ' .  $db->quoteName( 'adcfvc.field_value' ) . ' LIKE  ' .  $db->quote('%' . JString::strtolower($sf_value) . '%') 

我不确定您为什么要在那里使用 JString，但如果您觉得有必要，那很好。

这是你的子查询

SELECT adcfvc.advert_id
  FROM #__koparent_advert_specific_fields_values AS adcfvc
 WHERE adcfvc.advert_id = p.id
   AND adcfvc.field_name = ' . $db->Quote($sf_key) . '
   AND ' . $db->Quote(JString::strtolower($sf_value)) . ' = adcfvc.field_value

所以你已经有了 $db。

$subquery = $db->getQuery(true); 
// Assuming p.id is an integer
$subquery->where($db->quoteName(adcfvc.advert_id) = p.id)
//Assuming $sf_key is an integer
->where($db->quoteName(adcfvc.field_name) . ' = ' . $sf_key)
->where($db->quoteName(adcfvc.field_value) . ' LIKE ' 
    .   $db->Quote('%'. JString::strtolower($sf_value) . '%')) ;

然后在顶级查询中，您刚刚向我们展示了其中的一部分，例如

$query->where('p.id IN (' . $subquery . ')' );

关于php - 如何在 MYSQL 查询中组合 "LIKE"和 "IN"？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32401519/