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Does Oracle support Unicode?

commonly used Asian characters are represented in 2 bytes in UTF-16 (whereas the same characters require 3 bytes each in UTF-8), UTF-16 will occupy less storage on disk and in memory. Better compatibility with Java and Microsoft clients. Oracle started supporting Unicode as a database character set in Oracle7.

How to store Unicode data in Oracle?

You can store Unicode data in either the UTF-16 or CESU-8 encoding form in SQL NCHAR data types ( NCHAR , NVARCHAR2 , and NCLOB ). The SQL NCHAR data types are called Unicode data types because they are used only for storing Unicode data.

How to set UTF-8 encoding in Oracle?

To set the character encoding to UTF-8 on Oracle: To check what character encoding an Oracle database is using, run this query: select * from nlsdatabaseparameters. This query displays various settings in Oracle that deal with languages. Set the NLSCHARACTERSET and NLSNCHARCHARACTERSET parameters to UTF8.

How to use special characters in Oracle?

Oracle recommends that you enclose parameter and value pairs in double quotation marks. These special characters must be escaped using double quotation marks () around the special character or around the parameter value containing the special character.

How is Unicode stored?

Unicode text is processed and stored as binary data using one of several encodings, which define how to translate the standards abstracted codes for characters into sequences of bytes. The Unicode Standard itself defines three encodings: UTF-8, UTF-16, and UTF-32, though several others exist.