Database Character Set
Database character sets are used by Oracle for storing data in the data types CHAR, VARCHAR2, CLOB, and LONG (including the columns referenced in the data dictionary). It is the data set used for identifiers for things such as table names, index names, column names, and PL/SQL variable names, and for entering SQL commands and entering and storing PL/SQL source code. It is the character-encoding scheme used by the database that was defined in the CREATE DATABASE statement.
After the database is created, you cannot change the database character set without re-creating the database. It is therefore important that you consider the character set that you want to use. The following is a list of questions to consider when you ...
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