Right. I think I have worked out what you are trying to do. Correct me on the following where I am wrong:

You have data stored in a database which is numeric, but written in Urdu/Persian.

The data is stored in an NVARCHAR or NCHAR field.

You require a method to convert this data from the Urdu representation to the Hindu-Arabic numerals like so:

? = 9

? = 8

? = 7

? = 6

? = 5

? = 4

? = 3

? = 2

? = 1

? = 0

Paul