如何以列数据的变化

Question

我有如下表

Id | Status | date 
------------------- 
1 | Onsite |2007 
2 | Onsite |2008 
3 | Onsite |2009 
4 | Abroad |2010 
5 | Abroad |2011 
6 | Onsite |2012 
7 | Abroad |2013 
8 | Abroad |2014 
9 | Onsite |2015 

得到行我想在MySQL查询，当状态从“国外”改为“现场”返回的记录。 在上述情况下查询将返回我以下行：

6 | Onsite |2012 
9 | Onsite |2015 

Answer 1

尝试以下查询其作品即使IDS不是一个序列：

SELECT * 
FROM 'table_name' t 
WHERE t.status = 'Onsite' and 
     EXISTS(SELECT t1.id 
       FROM 'table_name' t1 
       WHERE t1.status = 'Abroad' and t1.id<t.id 
       ORDER BY t1.id DESC 
       LIMIT 1,1);