Int to Date in SQL SERVER 2000

Question

How to convert an int column ,Birthdate( sample value 20090301) to a date column in the format(01/03/2009) Sql Server 2000

I was trying to convert some thing like below

select * from tabl
where 
cast(dob as datetime)>='01/03/2009'
which gives an error

Msg 8115, Level 16, State 2, Line 1
Arithmetic overflow error converting expression to data type datetime.

Answer 1

SQL Server doesn't allow you to cast int -> datetime directly, but if you're sure you can cast it to nvarchar first and then cast it to date. For your question here's an example

declare @test int = 20090301
select CONVERT(datetime, CAST(@test as nvarchar), 112)

112 is the format you mentioned, here's the list of all possible formats for Convert function.

Answer 2

try this !

select * from tabl
where 
cast(convert(char(8),dob, 112) as date)>='2009-03-01'