How to get if a string is a number in T-SQL

Question

Is there an easy way to get if string is an integer number (consists only of digits) in MS SQL 2005?

Thank you for your help.

Answer 1

The function ISNUMERIC returns whether a string is numeric, but will return true for non-integers.

So you could use:

WHERE ISNUMERIC(str) AND str NOT LIKE '%.%' AND str NOT LIKE '%e%' AND str NOT LIKE '%-%'