hello,
let's say that each rows in a table contains a start time and a end
time ("timeinterval" type),
but the index are not ordered nor consecutive, e.g :
$ select * from T order by starttime
index | starttime | endtime
---------+-----------------+-----------------
3 | t1 | t2
1 | t3 | t4
18 | t5 | t6
12 | t7 | t8
I want a result that shows time gaps and overlaps in this table, that is :
delta
---------+
t3 - t2 |
t5 - t4 |
t7 - t6 |
how would I do that ? I guess this could be done with window function and lag()
function but I don't know exactly how. Any suggestion ?
thanks
I guess my question is more about
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