Why does ISNUMERIC('.') return 1?

Question

Recently I was working with ISNUMERIC in SQL Server, when I encountered a problem, which led to finding this snippet of code.

SELECT ISNUMERIC(\'.\')
         


        

Answer 1

I think it also interprets a number of other non-numeric fields as numeric, there's further info here -

http://classicasp.aspfaq.com/general/what-is-wrong-with-isnumeric.html