Microsoft KB Archive/104973
Article ID: 104973
Article Last Modified on 5/6/2003
- Microsoft Access 1.0 Standard Edition
- Microsoft Access 1.1 Standard Edition
- Microsoft Access 2.0 Standard Edition
- Microsoft Access 95 Standard Edition
This article was previously published under Q104973
Moderate: Requires basic macro, coding, and interoperability skills.
When you use the DateDiff() function on a large interval where the time periods are specified in minutes or seconds, the result is not correct.
The DateDiff() function returns a long integer. If the result is greater than the allowed range for long integers (-2,147,483,648 to 2,147,483,647), Microsoft Access truncates the value and returns the truncated value.
Steps to Reproduce Behavior
- Create a new module. Enter the following in the module's Debug window (or Immediate window in versions 1.x and 2.0), and then press ENTER:
Note that the returned value, 911,403,103 minutes, is truncated because the actual value exceeds 2,147,483,647.
Enter the following calculation, which is equivalent to the function above, and then press ENTER:
x=#12-31-100# y=#12-31-9999# ? (y-x)*24*60
Note that the returned value, 5,206,370,400 minutes, is correct. Note that Microsoft Access uses double-precision real numbers when doing immediate calculations.
Additional query words: date
Keywords: kbprb kbusage KB104973