SQL DATEDIFF function in DB2

The DATEDIFF function in DB2 is used to calculate the difference between two dates. It takes two arguments - the date values whose difference needs to be calculated and the unit of measurement for the result. The unit of measurement can be seconds, minutes, hours, days, months, or years.

Syntax

The syntax for using DATEDIFF function in DB2 is as follows:

DATEDIFF(unit, date1, date2)

Here, 'unit' specifies the unit of measurement, 'date1' and 'date2' are the two date values whose difference needs to be calculated.

Example

To calculate the difference between two dates using DATEDIFF function in DB2, the following query can be used:

SELECT DATEDIFF(DAY, '2021-01-01', '2021-02-01') AS DayDiff
FROM SYSIBM.SYSDUMMY1;

This query will return the difference between 1st January 2021 and 1st February 2021 in days.

Conclusion

The DATEDIFF function in DB2 is a useful tool in calculating the difference between two dates. It is easy to use and can save programmers a lot of time in writing custom date calculation functions.