mysqlmysql5mysql-5.1mysql-5.0

how to get row when change in column data

I have following table 

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

I want a query in MySQL, which returns a record when status is changed from 'Abroad' to 'Onsite'. In above case query will return me following rows:

6  | Onsite |2012
9  | Onsite |2015
Solution

  • Try the following query which works even if ids are not in an sequence: 

    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);