Ingres SQL date difference

问题

I need to find the difference between two dates in minutes. Here is the select statement I have been using:

 select date ('05.04.2017  11:12:00') - date('now');

It is returning -4 mins -21 secs but I want to see just 4 minutes. I could not find the answer in the ref guide, any idea how to show it in the format I need?

回答1:

http://ariel.its.unimelb.edu.au/~yuan/Ingres/us_13229.html

can you give this a shot... not familiar with ingres

select    INTERVAL('mins','today'-date('05.04.2017  11:12:00'))

http://www.r20.nl/TheSQLGuidetoIngres-AppendixB.pdf

来源：https://stackoverflow.com/questions/43219383/ingres-sql-date-difference