SQL Server、Unicode、雙位元字(DBCS)

SQL Server 6.5之前不支援雙位元字(DBCS Code Page)，需手動安裝 DBCS Code Page
SQL Server7.0之後才支援Unicode


Default code page for SQL Server：
https://support.microsoft.com/en-us/kb/153449
SQL Server 4.21a => code page 850 (Multilingual)
SQL Server 6.0 and 6.5 => ISO 8859-1 (Latin 1 or ANSI), 也就是 code page 1252


DBCS(double-byte character set) code page：cp-932、cp-936、cp-949、cp-950
Local                LCID          Code Page
--------------------------------------------
Chinese (PRC)        0x0804           936
Chinese (Taiwan)     0x0404           950
Chinese (Hong Kong)  0x0c04           950
Chinese (Singapore)  0x1004           936
Japanese             0x0411           932
Korean               0x0412           949

INF: Installing a DBCS Code Page for SQL Server
http://www.c-bit.org/kb/165051/EN-US/

SQL Server處理Unicode字串時，前置詞"N"之使用
http://eportfolio.lib.ksu.edu.tw/~A093000085/blog?node=000000009