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DaysBetweenQuery.mdb (beginner)(2000-2007)

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Roger Carlson View Drop Down
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Joined: 20 Feb 2008
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Roger Carlson Quote  Post ReplyReply Direct Link To This Post Topic: DaysBetweenQuery.mdb (beginner)(2000-2007)
    Posted: 29 Jan 2009 at 5:33am
Please consider donating $1 per sample downloaded, find out why here.
 
DaysBetweenQuery.mdb
 
This sample illustrates how to create a "Days Between" query.  It shows how to:
1) Display the difference between dates in subsquent records of a table
or
2) Display the difference between dates in subsquent records of a table  over a group.  In this case, the group is the OrderID field.

There are two methods shown here: Using a 1) correlated subquery and 2) DMax domain aggregate function.  The correlated subquery is the faster method, but it returns a non-updateable recordset.  The DMax method is slower, but the recordset is updateable.

HOWEVER, it should be noted that against a large dataset, neither method will be very fast!

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Access 2000+ (17 KB): 
DaysBetweenQuery.zip
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Roger Carlson View Drop Down
Microsoft MVP
Microsoft MVP


Joined: 20 Feb 2008
Status: Offline
Points: 238
Post Options Post Options   Thanks (0) Thanks(0)   Quote Roger Carlson Quote  Post ReplyReply Direct Link To This Post Posted: 30 Dec 2010 at 9:40am

Update:  Added detailed documentation.

Please consider donating $1 per sample downloaded, find out why here.<
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