adding on: if date also contains a time component, you can test this and subtract one day if time for comparison date is greater than time for the first date since a full day(s) will not have passed.
Depends on what you need to know. For example, as Dale noted, you could use DateDiff, but what that delivers is the number of time period boundaries between two date/time values.
For example, consider these two values:
2016-09-05 23:59:59
2016-09-07 00:00:00
DateDiff using "d" for the interval length, would return two. In terms of true time elapsed, it's one day plus one second.
So, what specifically are you trying to calculate?
Microsoft Access is a rapid application development (RAD) relational database tool. Access can be used for both desktop and web-based applications, and uses VBA (Visual Basic for Applications) as its coding language.