如何加快mysql结果

Question

我有一个用户传递字符串值，我们会说'make'这个词并且遇到问题：

首先，我必须获取keyword_id的搜索字符'make' keyword_id = 1234 keyword_id。然后我需要在 15个不同的表中查找具有该link_id的任何记录，并将每个记录与另一个表的link_id进行比较，并从每个表中返回所有记录在上一个结果中site_id。

我有两个有效的陈述，但返回结果的速度很慢。如果发现其他两个条件为真，是否有更好的方法可以从链接中获取url和SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword0 AS k0 ON k0.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k0.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword1 AS k1 ON k1.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k1.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword2 AS k2 ON k2.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k2.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword3 AS k3 ON k3.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k3.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword4 AS k4 ON k4.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k4.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword5 AS k5 ON k5.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k5.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword6 AS k6 ON k6.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k6.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword7 AS k7 ON k7.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k7.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword8 AS k8 ON k8.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k8.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyword9 AS k9 ON k9.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = k9.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyworda AS ka ON ka.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = ka.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keywordb AS kb ON kb.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = kb.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keywordc AS kc ON kc.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = kc.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keywordd AS kd ON kd.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = kd.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keyworde AS ke ON ke.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = ke.link_id WHERE k.keyword LIKE '%make%' UNION ALL SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword FROM search1_keywords AS k INNER JOIN search1_link_keywordf AS kf ON kf.keyword_id = k.keyword_id INNER JOIN search1_links AS l ON l.link_id = kf.link_id WHERE k.keyword LIKE '%make%' ？

这是我的疑问：

SELECT DISTINCT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword 
FROM search1_keywords AS k
INNER JOIN search1_link_keyword0 AS k0 ON k0.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword1 AS k1 ON k1.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword2 AS k2 ON k2.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword3 AS k3 ON k3.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword4 AS k4 ON k4.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword5 AS k5 ON k5.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword6 AS k6 ON k6.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword7 AS k7 ON k7.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword8 AS k8 ON k8.keyword_id = k.keyword_id
INNER JOIN search1_link_keyword9 AS k9 ON k9.keyword_id = k.keyword_id
INNER JOIN search1_link_keyworda AS ka ON ka.keyword_id = k.keyword_id
INNER JOIN search1_link_keywordb AS kb ON kb.keyword_id = k.keyword_id
INNER JOIN search1_link_keywordc AS kc ON kc.keyword_id = k.keyword_id
INNER JOIN search1_link_keywordd AS kd ON kd.keyword_id = k.keyword_id
INNER JOIN search1_link_keyworde AS ke ON ke.keyword_id = k.keyword_id
INNER JOIN search1_link_keywordf AS kf ON kf.keyword_id = k.keyword_id
INNER JOIN search1_links AS l 
ON l.link_id = k0.link_id OR
l.link_id = k1.link_id OR
l.link_id = k2.link_id OR
l.link_id = k3.link_id
WHERE k.keyword LIKE '%make%'

但非常慢 - 任何想法或帮助都会受到高度赞赏：

{{1}}

非常感谢任何帮助！

Answer 1

除了疯狂的数据库架构，你有15个不同的关键字表......

也许，在子查询中，您可以执行关键字表的并集。然后加入那个联盟一次。连接很昂贵，而且您当前的方法是为每个关键字表执行多个连接。

SELECT l.link_id, l.url, l.site_id, l.visible, k.keyword_id, k.keyword 
FROM 
     search1_keywords k
     INNER JOIN (
           SELECT keyword_id, link_id FROM search1_link_keyword0
           UNION ALL
           SELECT keyword_id, link_id FROM search1_link_keyword1
           UNION ALL
           ... and on and on
     ) AS keyword ON
           keyword.keyword_id = k.keyword_id
     INNER JOIN search1_links AS l ON l.link_id = keyword.link_id 
WHERE k.keyword LIKE '%make%'