SQL/MX 3.2 Reference Manual (H06.25+, J06.14+)

SQL/MX Functions and Expressions
HP NonStop SQL/MX Release 3.2 Reference Manual—691117-001
9-47
Considerations for DATEDIFF
startdate, enddate
is of type DATE or TIMESTAMP.
Considerations for DATEDIFF

If startdate is later than enddate, the return value is either negative or zero.

If the result is out of range for integer values, an error is returned.

The maximum seconds datepart allowed is equivalent to 68 years.

If a difference in weeks is specified, and one of the two dates is earlier than
January 7, 0001, then an error is returned.
Return type
The result is a signed integer value equal to the number of datepart boundaries
crossed between the first and second date.
Examples of DATEDIFF
The following example illustrates the use of DATEDIFF function:
>>select dt_ts, dt_date, datediff(second, dt_ts, dt_date)
from T01;
DT_TS DT_DATE (EXPR)
-------------------------- ---------- -----------
2008-11-12 03:03:03.000000 2011-11-27 95893017
2112-01-30 09:05:00.000000 2112-01-30 -32700
--- 2 row(s) selected.
SECOND S and SS
QUARTER Q and QQ
WEEK WW and WK