sql - MySQL select first and last records from a series of same value -


i have table this

id    status        timestamp 1        1     2012-02-03 00:00:05 2        1     2012-02-03 00:00:10 3        0     2012-02-03 00:00:15 4        0     2012-02-03 00:00:20 5        0     2012-02-03 00:00:25 6        1     2012-02-03 00:00:30 7        1     2012-02-03 00:00:35 8        1     2012-02-03 00:00:40 9        0     2012-02-03 00:00:45 10       1     2012-02-03 00:00:50

i using mysql. need sql query or stored procedure selects rows ids (1,2,3,5,6,8,9,10). ie need first , last record series of same "status" records after ordering timestamp. doable?. help!!!

drop table if exists my_table; create table my_table  (id int not null auto_increment primary key ,status        tinyint not null ,timestamp timestamp not null );  insert my_table values (1        ,1     ,'2012-02-03 00:00:05'), (2        ,1     ,'2012-02-03 00:00:10'), (3        ,0     ,'2012-02-03 00:00:15'), (4        ,0     ,'2012-02-03 00:00:20'), (5        ,0     ,'2012-02-03 00:00:25'), (6        ,1     ,'2012-02-03 00:00:30'), (7        ,1     ,'2012-02-03 00:00:35'), (8        ,1     ,'2012-02-03 00:00:40'), (9        ,0     ,'2012-02-03 00:00:45'), (10       ,1     ,'2012-02-03 00:00:50');  select a.id start      , min(c.id) end    my_table   left    join my_table b      on b.status = a.status    , b.id = a.id - 1   left    join my_table c      on c.status = a.status    , c.id >= a.id     left    join my_table d      on d.status = a.status    , d.id = c.id + 1  b.id null     , c.id not null    , d.id null  group      a.id;   +-------+------+ | start | end  | +-------+------+ |     1 |    2 | |     3 |    5 | |     6 |    8 | |     9 |    9 | |    10 |   10 | +-------+------+

here's fiddle same


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