Question

How can I run the following query in PostgreSQL (the following should work on MSSQL). The purpose is to see how much time apart to evens happened:

select ABS(CAST((a.timefield - b.timefield) as INT)) as 'Time Apart'
from a inner join b on (a.id = b.id);

Answer 1

Depending on the type of “a.timefield” and “b.timefield” this should work:

SELECT ABS(EXTRACT(EPOCH FROM (a.timefield - b.timefield))) AS "Time Apart" FROM a INNER JOIN b ON (a.id = b.id);