SQL Server : How to test if a string has only digit characters

Question

I am working in SQL Server 2008. I am trying to test whether a string (varchar) has only digit characters (0-9). I know that the IS_NUMERIC function can give spurious results.

Answer 1

Use Not Like

where some_column NOT LIKE '%[^0-9]%'

Demo

declare @str varchar(50)='50'--'asdarew345'

select 1 where @str NOT LIKE '%[^0-9]%'