How to get the numeric part from a string using T-SQL?

Question

I have the following string.

Input
--------------
2030031469-NAI 

To get the numeric part, I am using the following script

Answer 1

Please check with this, i used in my project for extracting phone numbers

 CREATE Function [dbo].[RemoveNonNumericCharacters](@Temp VarChar(1000))
    Returns VarChar(1000)
    AS
    Begin

        While PatIndex('%[^0-9]%', @Temp) > 0
            Set @Temp = Stuff(@Temp, PatIndex('%[^0-9]%', @Temp), 1, '')

        Return @TEmp
    End