Friday, August 31, 2012

Crystal Reports : Age and Date Math

Yes, this old chestnut never stops being useful;

One of the many things you will want to do with a bona-fide date field is calculate age.
Crystal makes it easy for us here; as long as we're comparing two date type fields, we can perform simple math.
Let us suppose that the date field in question is {CONTACTS.SOURCEDATE}, which represents when a particular prospect was imported into our database.

1. We can see how many records were imported in the last seven days

{CONTACTS.SOURCEDATE} <= CurrentDate() - 7

2. Or how "old" any particular record is, expressed in days


3. To calculate the age in years, we must use the Crystal DateDiff function:

DateDiff("yyyy", {CONTACTS.SOURCEDATE}, CurrentDate())

The "yyyy" specifies we want the answer in years; "m" and "d" are also options (months and days, correspondingly)

Note: In order for Date Math to work correctly, all evaluated fields MUST be Date Types. Otherwise they must first be converted to Date Types using a Crystal Function like CDATE(). 


Muhammad Amir said...

I wanted to give poor help me with math beleaguered Barbie a high five and say to her, “Rock on, sister, with your bad math self.

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