mysql - 如何在mysql中同时使用NOT LIKE和JOIN？

Question

我需要从查询中排除一些记录，其中日期名称在排除值“excl_days”中设置。

简单的功能正在运行:

SELECT post_id, start, end, excl_days FROM `mytable_events` 
WHERE `excl_days` NOT LIKE '%".$today_name."%' 
ORDER BY DATE(start) DESC

但是对于 JOIN 和 GROUP，我在添加 NOT LIKE 后得到空结果。没有 NOT LIKE 一切都工作正常。

SELECT o1.post_id, o1.start, o1.end, o1.excl_days 
FROM `mytable_events` o1 
JOIN `mytable_posts` o2 ON o1.post_id = o2.ID 
WHERE `o1.excl_days` NOT LIKE '%".$today_name."%'
GROUP BY o1.post_id ORDER BY DATE(o1.start) DESC

完整查询是:

SELECT o1.post_id, o1.start, o1.end, o1.excl_days 
FROM `mytable_events` o1 
JOIN `mytable_posts` o2 ON o1.post_id = o2.ID 
WHERE DATE(o1.start) <= '".$today."' AND DATE(o1.end) >= '".$today."'
AND o2.post_type = 'events' AND o2.post_status = 'publish' 
AND `o1.excl_days` NOT LIKE '%".$today_name."%'
GROUP BY o1.post_id ORDER BY DATE(o1.start) DESC

如何使其发挥作用？谢谢您的帮助。

Answer 1

试试这个:

  SELECT o1.post_id, o1.start, o1.end, o1.excl_days 
  FROM `mytable_events` o1 
  JOIN `mytable_posts` o2 ON (o1.post_id = o2.ID 
  AND o1.excl_days NOT LIKE '%".$today_name."%')
  GROUP BY o1.post_id ORDER BY DATE(o1.start) DESC