Question

我试图获得基于类别和关键字的搜索结果（使用like或regexp）但问题是，我的查询还返回其他类别结果它基于关键字。

SELECT * FROM (`listings`)
LEFT JOIN `listing_categories` ON `listings`.`ls_id` = `listing_categories`.`ls_id`
LEFT JOIN `listings_categories` ON `listing_categories`.`lc_id` = `listings_categories`.`lc_id`
LEFT JOIN `users` ON `users`.`id` = `listings`.`ls_user_id`
WHERE `listings`.`ls_status` =  1
AND listings_categories.lc_id = 17
OR listings_categories.lc_parent = 17
AND listings.ls_keywords LIKE '%Test Broken Functionality%'
OR listings.ls_keywords LIKE '%Test%'
OR listings.ls_keywords LIKE '%Broken%'
OR listings.ls_keywords LIKE '%Functionality%'
GROUP BY `listings`.`ls_id`
ORDER BY MATCH(listings.ls_keywords) AGAINST('Test Broken Functionality') DESC

类别ID 17在数据库中确实没有任何条目或帖子，但我的查询使用其他类别返回结果......

Answer 1

注意括号，几乎与(listings_categories.lc_id = 17 OR listings_categories.lc_parent = 17)和ls_keywords LIKE ...周围的IF语句一样。这会强制必须满足两个条件，而不是您拥有的多个条件：

SELECT * FROM (`listings`)
LEFT JOIN `listing_categories` 
    ON `listings`.`ls_id` = `listing_categories`.`ls_id`
LEFT JOIN `listings_categories` 
    ON `listing_categories`.`lc_id` = `listings_categories`.`lc_id`
LEFT JOIN `users` 
    ON `users`.`id` = `listings`.`ls_user_id`
WHERE `listings`.`ls_status` =  1
    AND (listings_categories.lc_id = 17 OR listings_categories.lc_parent = 17)
    AND (listings.ls_keywords LIKE '%Test Broken Functionality%'
        OR listings.ls_keywords LIKE '%Test%'
        OR listings.ls_keywords LIKE '%Broken%'
        OR listings.ls_keywords LIKE '%Functionality%')
GROUP BY `listings`.`ls_id`
ORDER BY MATCH(listings.ls_keywords) AGAINST('Test Broken Functionality') DESC

根据类别和关键字过滤搜索

1 个答案: