On 8/24/17, Simon Slavin <slav...@bigfraud.org> wrote:
>
> Numeric timestamps make it easy to do "24 hours after this timestamp".  But
> they make it difficult to do "9am the next day".

See the "Modifiers" section of https://sqlite.org/lang_datefunc.html

To get the date-and-time for "9am the next day" given a numeric
timestamp as a julian day number:

     SELECT datetime(numericJDTime, 'start of day', '+33 hours');

If you timestamp is unix (seconds since 1970):

     SELECT datetime(numericUnixTime, 'unixepoch', 'start of day', '+33 hours');

-- 
D. Richard Hipp
d...@sqlite.org
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