Oracle Chinese garbled Solution Summary

American_america. WE8ISO8859P1, this character encoding is a Western European character encoding, corresponding to the. NET is iso-8859-1 character encoding, so only need to change to the system's default character encoding on the line.

Workaround:

(1) server-side Reinstall Oracle

When you reinstall Oracle, select the character set that is consistent with the original data being unloaded (this example is Us7ascii).

Loads the original unloaded data.

This situation only applies to empty libraries and data that have the same character set.

(2)

Write a function:

The code is as follows	Copy Code
/**////<summary> Convert Western European character encoding to GB2312 </summary> <param name= "S" ></param> <returns></returns> public static string convert8859p1togb2312 (string s) { Return System.Text.Encoding.Default.GetString (System.Text.Encoding.GetEncoding ("iso-8859-1"). GetBytes (s)); }

(3) Forcibly modifying the server-side Oracle current character set

Before loading data with the IMP command, first log on to the System DBA user with Sql*plus on the client and execute the following SQL statements for the current Oracle database character Set modification:

The code is as follows	Copy Code
SQL > CREATE DATABASE Character Set Us7ascii * CREATE DATABASE Character Set Us7ascii ERROR at line 1: Ora-01031:insufficient Privileges

(3) Display Chinese garbled

Oracle 10g is installed on Redhat with no set character set, operating system default character set: WE8ISO8859P1, modifying character set to: ZHS16GBK. Because the process is not reversible, you first need to back up the database.
1. Database fully prepared

The code is as follows

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2. Querying the current character set Sql> SELECT * from nls_database_parameters where parameter= ' nls_characterset '; PARAMETER VALUE ---------------------------------------- ---------------------------------------- Nls_characterset WE8ISO8859P1 3. Close the database sql> shutdown Immediate Database closed. Database dismounted. ORACLE instance shut down. 4. Start database to Mount state Sql> Startup Mount ORACLE instance started. Total System Global area 205520896 bytes Fixed Size 1266608 bytes Variable Size 100666448 bytes Database buffers 100663296 bytes Redo buffers 2924544 bytes Database mounted. 5. Limit session Sql> alter system enable restricted session; System altered. 6. Query the relevant parameters and modify Sql> Show parameter job_queue_processes; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ Job_queue_processes Integer 10 Sql> Show parameter aq_tm_processes; NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ Aq_tm_processes integer 0 Sql> alter system set job_queue_processes=0; System altered. 7. Open the Database sql> ALTER DATABASE open; Database altered. 8. Modify Character Set Sql> ALTER DATABASE character set ZHS16GBK; ALTER DATABASE character Set ZHS16GBK * ERROR at line 1: Ora-12712:new Character set must is a superset of old character set The error prompts that the new character set must be a superset of the old character set, and that the original character set is a subset of the new character set, which can then be queried for the character set inclusion relationship on the Oracle Official document. This method is not recommended in the production environment using the Oracle Internal command Internal_use to skip the superset check. Sql> ALTER DATABASE character set Internal_use ZHS16GBK; Database altered. 9. Querying the current character set Sql> SELECT * from nls_database_parameters where parameter= ' nls_characterset '; PARAMETER VALUE ---------------------------------------- ---------------------------------------- Nls_characterset ZHS16GBK 10. Close the database sql> shutdown Immediate Database closed. Database dismounted. ORACLE instance shut down. 11. Start database to Mount state Sql> Startup Mount ORACLE instance started. Total System Global area 205520896 bytes Fixed Size 1266608 bytes Variable Size 100666448 bytes Database buffers 100663296 bytes Redo buffers 2924544 bytes Database mounted. 12. Change the relevant parameter back to the original value Sql> alter system set job_queue_processes=10; System altered. 13. Open the Database Sql> ALTER DATABASE open; Database altered.