SQL Server Determine if date is recurrance date

I need to determine if GETDATE()  is exactly on a two week interval from a specific date

Example...
A person has a payment to make
First Payment was on July 20th 2010
Interval is Bi-Weekly (Every 2 weeks)

Is today THAT "every 14 days" date? Yes/No
Larry Bristersr. DeveloperAsked:
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Jim HornConnect With a Mentor Microsoft SQL Server Developer, Architect, and AuthorCommented:
<Air code.  I do my own stunts too>

SELECT CASE 
  WHEN DATEADD(d, 14, FirstPaymentDate) = CAST(GETDATE() as date) THEN 'Yes'
  ELSE 'No' END as MakeUpAColumnNameHere

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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
... or if we're talking 'If this is on the 14th date somewhere out in the future' then use Modulo... 

SELECT CASE 
  WHEN DATEDIFF(d, FirstPaymentDate, CAST(GETDATE() as date)) % 14 = 0 THEN 'Yes'
  ELSE 'No' END as MakeUpAColumnNameHere

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Larry Bristersr. DeveloperAuthor Commented:
You answered my question correctly
I will have a follow-up question
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