Customizable export data queries

List of contents of this article:

• 1, When building an instance on Oracle on Linux, characters How should the set be set
• 2, LINUX-ORACLE installation, which words should be selectedSymbol set
• 3, Linux Chinese character set linux Chinese character
• 4,linux character set linux character set settings
• 5, How to obtain the character set adopted by the linux terminal

When building an instance on Oracle on Linux, how should the character set be set

1, log in to the database with SYSTEM.2)) EXECUTE UPDATE SYS.PROPS$ SET VALUE$=WE8ISO8859P1 WHERE NAME LIKE NLS_CHAR%; SENTENCE.

2. ORACLE can use this: NLS_LANG=AMERICAN_AMERICA.ZHS16GBK Description: NLS_LANG generally consists of three parts, language, region and character set that really affect the database character set. It's actually the third part.

3、select * from nls_database_parameters where parameter in (NLS_LANGUAGE,Customizable export data queries NLS_TERRITORY, NLS_CHARACTERSET); Format: NLS_LANG=language_territory.charset (Language_Region. Character set), each component controls the characteristics of the NLS subset.

4. If you are going to use JDBC (which is very convenient for cross-platform Oracle applications), just add this option when the installation screen asks you to select components. Of course, you should install JDK first. Personally, I use Blackdown's JDK 7.

5. Oracle can support multiple languages and character sets, among which oracle8I supports 48 languages, 76 countries and regions, and 229 character sets, while oracle9i supports 57 languages, 88 countries and regions, and 235 character sets.

6. After returning to the control panel, it means that the backup is completed. You can turn off the browser at any time~ If you still need to back up the file, you can follow the above path again, and I won't repeat it here.

LINUX-ORACLE installation, which character sets should be selected

1, ZHS16GBK IT INDICATES THAT LINUX CAN ALSO USE THIS CHARACTER SET WITH GBK ENCODING FORMAT AND 16-BIT (TWO BYTES) SIMPLIFIED CHINESE CHARACTER SET.

2. It is recommended to choose UTF-8, because most of the current developments use this character set. Remarks: Even if the selection is not suitable, it is okay to modify it later (after logging in with the system administrator rights, you can modify the code format, and then restart).

3. Database character set (Oracle server-side character set) The database character set is specified when creating the database and usually cannot be changed after creation. WHEN CREATING A DATABASE, YOU CAN SPECIFY A CHARACTER SET AND A NATIONAL CHARACTER SET.

4. If you want to save trouble, it is recommended to select the ZHS16GBK character set here.

5. The oracle character set is utf8, not utf-8.

6. The ORACLE database is divided into national character set and database character set. Both need to be set when creating a database.

Linux Chinese character set linux Chinese character

You can execute the file command on the command line to view the return information to confirm the character set encoding of the file.

locale -a|grep zh #locale -a can display all the character sets supported by the system. This command can find out the character sets related to Chinese for later modification.

fileABC.log ABC.log: UTF-8Unicodetext Judging from the results, the file is in utf-8 format fileword.txtword.txt: ASCIIText Judging from the results, the file is in gbk format. If it does not meet the requirements, the file format can be changed through the iconv command.

The method of linux entering the character command interface is as follows: when the system is not in the virtual machine, use ctrl+alt+F1~6 to switch to the command line interface; ctrl+alt+F7 to switch to the graphical interface.

How to change the Linux system language/character set? Change the system language/character set of redhat to modify the /etc/sysconfig/i18n file, such as LANG=en_US, xwindow will display the English interface, LANG=zh_CN.GB18030, xwindow will display Text interface.

linux character set setting linux character set setting

View and modify the character set under the Windows platform View the character set: chcp modifies the character set to 936: c Hcp936 can get the code page information of the operating system. You can view the detailed character set information corresponding to the code page from the language options of the control panel.

locale -a|grep zh #locale -a can display all the character sets supported by the system. This command can find out the character sets related to Chinese for later modification.

Method 2, decompress through the unzip line command, specify the character set unzip-OCP936xxx.Zip (with GBK, GB18030 is also available) Interestingly, there is no description of this option in the unzip's manual. unzip_help has a simple line of description of this parameter.

How to get the character set used by the linux terminal

You can execute the file command on the command line to view the return information to confirm the character set encoding of the file.

There are two ways to list the character set supported by MySQL: SQL statement View the metadata dictionary table Query results: 1) The first column represents the character set name; 2) The second column represents the character set sorting rules; 3) The third column represents the character set description; 4) The fourth column represents the word The maximum number of bytes encoded by the symbol set.

I. View file encoding: You can view file encoding in Linux in the following ways: You can directly view file encoding in Vim: setfileencoding can display the file encoding format.

Sceme 2: Or use other remote login software and modify the configuration to set the character encoding to UTF-8.

Please configure the character set of the client side to the same character set as the Linux operating system. If there is still garbled code, there may be a problem with the data in the database, or there is a problem with the configuration of the oracle server.

Character set Character set, or word set, refers to the collection of characters; charactersTHERE ARE MANY TYPES OF SETS, AND EACH CHARACTER SET CONTAINS A DIFFERENT NUMBER OF CHARACTERS. COMMON CHARACTER SET NAMES: ASCII CHARACTER SET, GB2312 CHARACTER SET, GB18030 CHARACTER SET, UNICODE CHARACTER SET, ETC.