什么是Flat File
来源:互联网 发布:大学生 数据 申请 编辑:程序博客网 时间:2024/05/29 03:21
"Flat"which means it has no structure for indexing and there are usually no structural relationships between the records.
一个flat file即可以是纯文本文件(plain text file),也可以是二进制文件(binary file)。
纯文本文件
plain text is the data (e.g. file contents) which represent only characters of readable material but not its graphical representation nor other objects (images, etc.). It may also include a limited number of characters that control simple arrangement of text, such as line breaks or tabulation characters.
The encoding has traditionally been either ASCII, sometimes EBCDIC. Unicode-based encodings such as UTF-8 and UTF-16 are gradually replacing the older ASCII derivatives limited to 7 or 8 bit codes.
二进制文件
Binary files are usually thought of as being a sequence of bytes, which means the binary digits (bits) are grouped in eights. Binary files typically contain bytes that are intended to be interpreted as something other than text characters. Compiled computer programs are typical examples; indeed, compiled applications are sometimes referred to, particularly by programmers, as binaries. But binary files can also mean that they contain images, sounds, compressed versions of other files, etc. — in short, any type of file content whatsoever.
Some binary files contain headers, blocks of metadata used by a computer program to interpret the data in the file. The header often contains a signature or magic number which can identify the format. For example, a GIF file can contain multiple images, and headers are used to identify and describe each block of image data. The leading bytes of the header would contain text like GIF87a or GIF89a that can identify the binary as a GIF file. If a binary file does not contain any headers, it may be called a flat binary file.
- 什么是Flat File
- A flat file counter
- Flat file data souce
- 什么是平场校正 Flat Fielding
- Plain Binary (Flat-Form Binary) File
- Extract data from DB to flat file
- 什么是32位汇编的flat平坦内存模式
- Bulk Insert from Flat File Using Transact-SQL
- Updating the flat file of an iSCSI target in AIX
- How to FTP a Dynamically Named Flat File
- 什么是Sequence File
- 什么是File类
- 如何从EXCEL文件加载Hierarchy到BW (How to Load Hierarchy From Flat File)
- Read A Flat File Using File Layout And Insert Into The Specific Component Using CI ( Bulk Insert )
- Read A Flat File Using File Layout And Insert Into The Specific Component Using CI ( Bulk Insert )
- Flat UI
- 95.You have a large amount of historical data in a flat file. Some analysts in your organization nee
- File IO(NIO.2):什么是路径?
- java作业源代码。。。
- AlexNet
- Android实际音乐播放的代码
- bitmap的二次采样
- ubuntu用户忘记密码怎么办?
- 什么是Flat File
- 第三周项目四 穷举法解决组合问题(百钱买百鸡)
- 本月有几天
- vim 常用快捷键
- 百度编辑添加图片如何设置图片大小,到前台显示不变形
- oracle hint 详解
- 程序员如何优雅的挣零花钱?
- Linux 设备驱动的并发控制
- [Unity插件]DOTween(3)