Unicode-Why do some SQL strings have an 'N' prefix?

You may have seen Transact-SQL code that passes strings around using an N prefix. This denotes that the subsequent string is in Unicode (the N actually stands for National language character set). Which means that you are passing an NCHAR, NVARCHAR or NTEXT value, as opposed to CHAR, VARCHAR or TEXT.

Unicode is typically used in database applications which are designed to facilitate code pages which extend beyond the English and Western Europe code pages. Example: Chinese.

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BIG Data, Hadoop – Chapter 2 - Data Life Cycle

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How to Copy or Move Multiple Files from One Folder to Another Folder using Talend

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