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https://stackoverflow.com/questions/7179181/getting-sqlplus-to-spool-out-unicode-characters-are-being-output-as
I am attempting to get Oracle sqlplus (10.2) to spool out Unicode data on a Linux machine. I have found several discussions of this issue, but no clear answers, other than to check locale settings and set NLS_LANG to AL32UTF8.
https://stackoverflow.com/q/7179181
As a footnote, changing NLS_LANG to support UTF8 may cause SQLPlus to output columns as different widths if they're defined in CHAR length semantics instead of BYTE. If you need to ensure a column's formatting, you *must manually COLUMN x FORMAT y .
https://dba.stackexchange.com/questions/142359/cmd-prompt-cant-display-unicode-characters-that-are-stored-in-oracle-database-c
If they are added to the database from the CMD prompt they can be displayed correctly everywhere. For now I'm sure that the characters input from the browser and P/SD are Unicode characters, but not for the CMD input, which is also supposed to be Unicode since both the server and client charsets have been set to AL32UTF8.
http://www.sqlsnippets.com/en/topic-13434.html
If NLS_LANG is not set in the session's environment then SQL*Plus sessions started in this window will either use an ANSI code page character set as defined in the windows registry's NLS_LANG setting or, failing that, it will use US7ASCII. Neither choice is acceptable when working with Unicode characters.
http://www.dskims.com/oracle-unicode-spooling/
Setup your client application correctly. make sure your NLS_LANG variable is set correctly, it must support unicode. I set mine to AMERICAN_ENGLISH.UTF8 . While the DOS window of SQL*Plus won't display all unicode characters, they will be spooled correctly into the file.
https://dba.stackexchange.com/a/187036
Spool Unicode data in sqlplus to ISO-client without character set conversion. I'm currently facing the following problem: We have an Oracle 11g database with character set AL32UTF8, and an sqlplus-client with NLS_LANG=GERMAN_GERMANY.WE8ISO8859P1. Stored in the database are various non-ISO8859-1 characters.
https://www.orafaq.com/forum/t/199726/
SQL Developer is a java application, it natively supports UNICODE. Display issues (in SQL Developer) generally are caused by using a code editor font that doesn't support your character(s).
https://docs.oracle.com/cd/B19306_01/server.102/b14225/ch6unicode.htm
Because most of the code is written in Java and PL/SQL, changing the database character set to UTF8 is unlikely to break existing code. Unicode support is automatically enabled in the application. Because the application supports French, German, and Japanese, there are few supplementary characters. Both AL32UTF8 and UTF8 are suitable.
https://community.oracle.com/thread/4110505
May 01, 2018 · It does not support the full set of Windows fonts and the fonts available do not cover all languages in your example. There is no complex script rendering for Command Prompt, which means that complex scripts, such as Arabic, Hebrew, Devanagari, or Thai will not work. Use a GUI tool instead.
https://docs.oracle.com/cd/B10501_01/server.920/a90842/ch12.htm
Configuring Globalization Support in iSQL*Plus To display another language in i SQL*Plus, you must configure all three tiers. The following example is for Japanese using the Unicode (UTF-8) character set in Microsoft Windows.
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