sql - 如何从两列中选择日期之间的日期？

Question

此选择不起作用：

SELECT collaborators.fullname, learnings.state_id, orgs.name AS orgs_name, courses.name AS courses_name
FROM learnings
LEFT JOIN collaborators ON learnings.person_id = collaborators.id
LEFT JOIN orgs ON collaborators.org_id = orgs.id
LEFT JOIN courses ON learnings.course_id = courses.id
WHERE collaborators.org_id = :org_id
AND learnings.start_date BETWEEN :date1 AND :date2
AND learnings.finish_date BETWEEN :date1 AND :date2

如果您在请求中留下以下内容之一：

AND learnings.start_date BETWEEN :date1 AND :date2

或者

AND learnings.finish_date BETWEEN :date1 AND :date2

然后选择有效。请告诉我：如何在此查询中组合两列start_date并将finish_date它们过滤为一列？

Answer 1

如果您想要两个时间段之间有任何重叠，那么您可以使用：

AND
learnings.start_date <= :date2 AND
learnings.finish_date >= :date1 

如果您希望一个时间段完全在另一个时间段内 - 例如，learnings在两个日期内完成的时间戳 - 您可以使用：

AND
learnings.start_date >= :date1 AND
learnings.finish_date <= :date2