>>Is for Unicode support,
http://support.microsoft.com/kb/239530>
>Thus, in order to avoid unexpected situations, it is always recommanded to always put N in front a command line defined in a string, such as in my example. Is that correct?
Yes. There are a number of built-in stored procedures that require unicode strings (no particular reasoning behind it AFAIK).
The only downside is that your commands take more space internally - generally not an issue at all.
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