Question

I have the data in table like below:

  **start_date**                         **end_date**
---------------                      -----------------
2011-06-27 13:24:45.137417          2011-06-28 05:34:26.54939
2011-09-30 09:09:00.501381          2011-10-03 23:38:46.479824

the expected result would be like below:

Diff
-------
0.16
3.14

where the digits before the decimal point is “Days” & after decimal point is “Hours”

i try it using
extract(‘epoch’ from (end_date-start_date))/(3600*24)

but it gives the “hours” value in format of 100 i.e 0.673395971909722 for the first record & 3.60400438012731 for second record

Answer 1

See formatting functions in the documentation.

SELECT to_char(end_date - start_date, 'D.HH24') AS diff FROM your_table;

0.16
3.14

Hope it helps.