Michael, your code fails when one year rolls over to another

for example, with the test cases and the presumed current date modified:

declare @emp table

(empid int identity(1,1) primary key clustered, dob datetime not null)

insert into @emp (dob)

SELECT convert(datetime,'1962-01-01 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1958-12-31 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1960-02-29 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1990-08-30 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1990-09-03 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1990-09-04 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1985-09-05 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1985-09-10 00:00:00.000') AS dob UNION ALL

SELECT convert(datetime,'1985-09-11 00:00:00.000')

select

a.*,

BirthdayThisYear = dateadd(yy,datediff(yy,dob,getdate()),dob),datediff(dd,'Dec 31, 2010' ,dateadd(yy,datediff(yy,dob,getdate()),dob))

from

@emp a

where

--Birthday between tomorrow and 7 days from today

datediff(dd,'Dec 30, 2010' ,dateadd(yy,datediff(yy,dob,getdate()),dob))

between 1 and 7

The expected result is emp 1 and 2 returned, but you only get emp 2. Lowell's has the same problem.