Understand Unicode and code pages in SQL Server collations
Why all SQL Server 2008 R2 collations are associated to a code page. Are all collations unicode ? How to choose a collation when our database is used by several languages using differents code pages ? Thank you. CHAR vs. NCHAR (ie. Non-Unicode vs. Unicode) defines the character storage encoding. Collations define... collation (ie. sort order and comparison rules). They are different concepts, although often confused. The confusion stems from the fact that the client tools use the collation of non-Unicode data as hint to choose the code page of the data. See Code Page Architecture . This means