![]() In those days, Asian languages in particular, employed their own specific - and mutually incompatible - encodings, with GB for mainland Chinese, JIS/SJIS for Japanese, BIG5 in Hong Kong and Taiwan, CNS in Taiwan, etc. This use-case was designed when the Internet was still in its infancy and before the Unicode project had taken off. ![]() The idea was that VARCHAR would continue to be utilized for ASCII, with NVARCHAR being employed for non-ASCII characters. Originally intended for pre-Unicode multibyte encodings like JIS encoding for Asian characters. ![]() Nchar is short for "NATIONAL CHARACTER", nvarchar stands for "NATIONAL CHARACTER VARYING", and ntext is the ISO synonym for "NATIONAL TEXT". Tracing the Roots of Unicode and Non-Unicode Data Types In today's blog, we'll compare the two categories to decide when to use one over the other. These equate to nchar, nvarchar, and ntext for Unicode types and char, varchar/varchar (max) and text for non-Unicode. Moreover, SQL Server splits its string types into two broad categories: Unicode and non-Unicode. In the context of relational databases, character string data types are those which allow you to store either fixed-length (char) or variable-length data (varchar). A character string is a series of characters manipulated as a group. One data type that causes some confusion among database designers and developers are those for storing character strings. It can be an integer, character string, monetary, date and time, and so on. As you may have guessed, data type is an attribute that specifies the type of data that a column can store. SQL Server provides a number of data types that support all types of data that you may want to store. Unicode and Non-Unicode String Data Types in SQL Server by Robert Gravelle
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