Question

Trying to select a date (x) days from today’s date, where the date would be start of day (e.g. 12:00am that day).

For example, a query with date 5 days earlier..

@"select pkey, dateofmod from data WHERE dateofmod >= date('now', '? days')" ,  [NSNumber numberWithInt:-5]; 

doesn’t seem to work. (using FMDB).

Answer 1

Is this what you need?

sqlite> SELECT date( julianday(date('now')));
2009-08-19
sqlite> SELECT date( julianday(date('now'))+2);
2009-08-21

julianday does “round” to midnight:

sqlite> SELECT datetime( julianday(date('now')));
2009-08-19 00:00:00
sqlite> SELECT datetime( julianday(date('now'))+2);
2009-08-21 00:00:00

Usually with SQLite you want to use julianday if you are adding a number of days to a date.

SQLite Date and Time Functions