date - How to find a lifespan of a name in MySQL? -


i have sql table containing series of ids , dates that id registered in system. 1 id can registered several time. table below :

id           date 3          16/6/2009  4          2/4/2010 7          4/9/2012 3          12/6/2009 7          2/8/20011 3          16/12/2009 etc..

from table like extract ids lifespan (i want subtract firstseen date , lastseen date).ids can have same date , id can registered in different days.

do knows query should use required result below?

id               date(week) 3               2/4/2009-16/6/2009 4                  2/4/2010 7               2/8/20011-4/9/2012 

 select x.id       , x.start            ( select id              , min(date) start            my_table          group              id       ) x     left     join        ( select id              , max(date) end            my_table          group             id       ) y       on y.id = x.id      , y.end > x.start;

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