有人可以帮我解决这个问题吗?它工作正常,但需要太多时间。我确定问题出在tb_activities
. 有没有人有任何想法让这个查询更快?
SELECT tb_posts.*
FROM tb_posts
WHERE EXISTS (SELECT c_id
FROM tb_users
WHERE tb_posts.c_uid = tb_users.c_id
AND tb_users.c_tokens > 0)
AND NOT EXISTS (SELECT c_id
FROM tb_activities
WHERE tb_posts.c_url = tb_activities.c_url
AND tb_activities.c_category = 'gplus'
AND ( tb_activities.c_uid LIKE '%,6x1,%'
OR tb_activities.c_uid LIKE '%,6x1'
OR tb_activities.c_uid LIKE '6x1,%'
OR tb_activities.c_uid = '6x1' ))
AND NOT EXISTS (SELECT c_id
FROM tb_blacklist
WHERE tb_posts.c_url LIKE Concat('%', tb_blacklist.c_url
, '%')
AND tb_blacklist.c_times > 2
AND tb_blacklist.c_category = 'gplus')
AND tb_posts.c_category = 'classic'
AND tb_posts.c_status = 'run'
AND tb_posts.c_nogplus = 0
GROUP BY tb_posts.c_url
ORDER BY tb_posts.c_cost DESC,
tb_posts.c_date DESC
LIMIT 30