>It seems you're confusing surrogate keys with GUIDs. The size of GUID is fixed because it's a 16-byte (128-bit) number. A character hexadecimal representation of a GUID is from 32 to 38 characters in lengh depending on a format
>

>32 - 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
>36 - 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'
>38 - '{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}'
>

>Check http://www.berezniker.com/content/pages/visual-foxpro/generate-guid
>

Hi,

You are right about the definition of GUID and thanks for the link.

Btw, lets just talk about surrogated key, I am interested to know how do you normally decide a length?