ASCII, GB2312, GBK, UTF-8 encoding:
Original address: HTTP://HI.BAIDU.COM/PHPEASE/ITEM/F450B5CAEC143014505058FC
variable naming rules:
1. Variable names are case-sensitive (case-sensitive).
2. Must begin with a letter or underscore. Variable
In front of actually also talked about the ASCII, but not very specific, as a part of a complete series, or it is necessary to talk about, but also as a basis for discussion later. AsciiIts full name is american Standard Code for information
ASCII (American Standard Code for information interchange) is a computer coding system based on Latin letters. It is mainly used to display modern English and other Western European languages. It is the most common single-byte encoding system today
Features of 1.ASCIIASCII is an encoding specification used to denote English characters. Each ASCII character occupies 1 bytes, so the maximum number of characters that the ASCII encoding can represent is 255 (00H-FFH). This is not a problem for
American Standard Information Interchange Standard Code
(American Standard Code for information interchange, ASCII)
In a computer, all data is stored and computed in binary representation (because the computer is silly, only the binary values of
Chr () and ASCII () functions in Oracle (attached: characters commonly used and ASCII table)keywords: chr ()Chr () function action: Special handling of "special" charactersThe corresponding loadline and special characters can be queried in PlsqlChr (
Oracle Character Set and encodingMorven. Huang: C #, ORACLE, etc. oracle handbook Series 10: Character Set, encoding, and Oracle
Part 1 Character Set and coding knowledge
Character Set:
Some characters are collected to one place as needed and
ASCII, American Standard Code for Information Interchange reads like "astkey" and defines the English letters or the same result and meaning represented by the 127 numbers ranging from 0 to one hundred and twenty-eight. Because only seven digits
ASCII code table
The ASCII code can be roughly divided into three parts.The first part is ASCII non-printable control characters;The second part is: ASCII printing characters;The third part is: Extended ASCII print characters.Part 1: ASCII
Currently, the most widely used character set and Its Encoding in computers are American Standard Code for information interchange (American Standard Code for information interchange) developed by the National Bureau of Standards (ANSI ), it has
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