How to solve the problem of Chinese garbled characters imported into Oracle

Solution to the problem of oracle importing Chinese garbled characters: 1. Change the database parameter NLS_LANG of the Oracle database and change the parameter to the Chinese character set, such as: simplified Chinese_China.ZHS16GBK. This parameter setting will affect all character data in the database. Valid; 2. Multiple character sets can be mixed in the database; 3. The running character set should be specified in the SQL statement; 4. The encoding format must be set correctly, etc.

The operating environment of this tutorial: Windows 10 system, Oracle version 19c, Dell G3 computer.

Oracle Chinese garbled problem solution

1. Oracle database sets the database parameter NLS_LANG

to ensure that there is no garbled code when storing and displaying Chinese in the Oracle database. Question, you can change the database parameter NLS_LANG of the Oracle database to the Chinese character set, such as: simplified Chinese_China.ZHS16GBK. This parameter setting will be effective for all character data in the database.

2. Solution to the confusion of multiple character sets in 0racle. Database

Generally, the character sets used by systems and databases may have multiple characters, such as full-width characters, English letters, Airborne, etc.; while Oracle database supports multiple character sets, users can mix and use multiple character sets in the database. For example, use the UTF8 character set to encode Chinese, English, and full-width characters; use the UTF16 character set to encode Unicode characters; use the GBK/GB2312 character set to encode Chinese characters.

3. Pay attention to the specification of SQL statements and character sets

In order to prevent garbled characters when running SQL statements, the running character set should be specified in the SQL statement, such as: ALTER SESSION SET NLS_LANGUAGE=AMERICAN_AMERICA .AL32UTF8

4. Client application specifies encoding format

For client applications, such as sqlplus and PL/SQL development tools, the client encoding format needs to be specified before connection to ensure transmission and display. There is no garbled code problem. This solution is more common. Set the NLS_LANG parameter in the client application so that the client's Chinese characters use Unicode. For example: NLS_LANG = SIMPLIFIEDCHINESE_CHINA.UTF8. You can successfully connect to the Oracle database to solve the garbled code problem.

5. Chinese processing of data import and export

When importing Oracle database from other databases, you should find the field code from the source database and convert the field code into the character code in the Oracle database during import. , which can increase the normal display of Chinese characters in the database. When exporting data from Oracle database to other databases, the character encoding in the Oracle database should be converted into the encoding method of the target database to ensure that the exported data is garbled.

6. Analysis of the causes of Chinese garbled characters

One of the common causes of Chinese garbled characters is that the encoding format of the program is not set correctly. Character sets such as GBK/GB2312 are combined with Unicode character sets such as UTF-8. Mixed use may result in Chinese garbled characters. In addition, data conversion between programs and databases will inevitably lead to the generation of Chinese garbled characters.

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