How to Diagnose Losing Characters , Getting "Funny" Output When Inserting or Selecting Other Than A-Z,a-z ( = Non English Data Like Chinese, Russian, Hebrew , Insert Any Language Here to the List That is Not English) in/from CHAR, VARCHAR2, LONG or CLOB
(Doc ID 1628060.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle Database - Enterprise Edition - Version 184.108.40.206 and later
Oracle Database - Standard Edition - Version 220.127.116.11 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
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Trying to select from or insert in CHAR, VARCHAR2, LONG or CLOB datatypes other than A-Z,a-z data ( = non English data like Chinese, French, Russian, Hebrew , insert any language here to the list that is not English or "special characters" like the € symbol) and the result is
- or some form of a question mark like ? , ¿ or �.
- or the data shows up as "funny" characters for example Â¯Â°Â±Â²Â³Â´ÂµÂ¶Â·Â¹ instead of the expected data.
Changes can be many, new client installation, new database installation or simply trying to use a not used language before in an existing system with "normal" CHAR, VARCHAR2, LONG or CLOB column types.
This note provides a step by step approach to find out where the problem is and then how to correct it.
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In this Document
|A) Install Oracle SQLdeveloper 4 (or 3) on an windows client (preferably Microsoft Windows 7 or higher)|
|B) Confirm this Microsoft Windows client used for Oracle Sqldeveloper can display the language you want to check/see and has the needed OS support and fonts.|
|B.1) check if there is need to add support to Microsoft Windows Operating System for the language(s) that are used .|
|B.2) check if the Microsoft Windows has Unicode fonts installed that define the language(s) that are used .|
|C) If point B) is fine then confirm that the Oracle SQLdeveloper interface can handle the language(s) you want to check.|
|D) If point C) is fine then use Oracle SQLdeveloper to check that the database is able to store the characters/language you want to use.|
|E) If point D) is fine then use Oracle SQLdeveloper to check EXISTING data inserted or loaded trough an application, script , batch job, import, sqlldr, external table, dblink from an other database, etc.|
|F) If point E) is fine then check the configuration of the selecting tool / application.|