code page is character set. A character set determines the types of characters that SQL Server recognizes in the char, varchar, and text data types. A character set is a set of 256 letters, digits, and symbols specific to a country or language. The printable characters of the first 128 values are the same for all character sets. The last 128 characters, sometimes referred to as extended characters, are unique to each character set. A character set is related to, but separate from, Unicode characters. 所以，我觉得yangzi的回答虽然简单，但是对的。
A character set determines the types of characters that SQL Server recognizes in the char, varchar, and text data types. A character set is a set of 256 letters, digits, and symbols specific to a country or language. The printable characters of the first 128 values are the same for all character sets. The last 128 characters, sometimes referred to as extended characters, are unique to each character set. A character set is related to, but separate from, Unicode characters.
所以，我觉得yangzi的回答虽然简单，但是对的。