Question

I have the following table:

ticket    arrivaltime        resolution time    status

t1        '2012-09-03'        null               new
t2        '2012-09-04'        null               new
t1        (can be anything)   '2012-09-14'       verified    
t1        (can be anything)   '2012-09-16'       verified
t2        (can be anything)   '2012-09-06'       verified

Now I want to find, for example, for t1 the difference in days:

Age(t1)=(resolution time of last entry) - (arrival time of first entry)

Similarly I’ll find it for t2.

How can I find this?

Answer 1

You can do something like:

SELECT TICKET, DATE_DIFF(MAX(RESOLUTION_TIME) - MIN(ARRIVAL_TIME)) AS DIFF FROM TABLE GROUP BY TICKET