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Oracle Data Types - NCHAR

Versions: Oracle 11g, 10g, 9i, 8i and 7.3

Oracle - NCHAR
Syntax NCHAR[(n)]
Data Fixed-length character data in Unicode - UTF-8 or UTF-16
Parameters n is the maximum number of characters, optional
Range 1 ⇐ n ⇐ 2000/charsize
Default n is 1
Padding Right-padded with spaces to n
Trailing Spaces Not removed when the value is retrieved
Empty String '' is treated as NULL
Error Handling Error is raised if the value is too long
Storage Size n*charsize bytes
Synonyms NATIONAL CHAR, NATIONAL CHARACTER
Standards ANSI SQL

Oracle NCHAR - Equivalents in Other Databases

Database Data Type and Conversion
SQL Server NCHAR(n), 1 ⇐ n ⇐ 4000, Unicode - UCS-2
IBM DB2 GRAPHIC(n), 1 ⇐ n ⇐ 127, double-byte
MySQL NCHAR(n), 0 ⇐ n ⇐ 255, Unicode - UTF8 and TEXT or VARCHAR(n), 1 ⇐ n ⇐ 65535/charsize
PostgreSQL CHAR(n), 1 ⇐ n ⇐ 1G
Sybase ASE NCHAR(n), 1 ⇐ n ⇐ pagesize (2K, 4K, 8K or 16K); UNICHAR(n), 1 ⇐ n ⇐ pagesize, Unicode
Sybase ASA NCHAR(n), 1 ⇐ n ⇐ 8191, Unicode - UTF-8
Informix NCHAR(n), 1 ⇐ n ⇐ 32767, database character set
Teradata CHAR(n), 1 ⇐ n ⇐ 64000/charsize
HP Neoview NCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns), Unicode - UCS-2 or ISO88591 (Latin1)
Interbase/Firebird NCHAR(n), 1 ⇐ n ⇐ 32767, single-byte ISO8859_1 (Latin 1); CHAR(n), 1 ⇐ n ⇐ 32767, with CHARACTER SET UTF-8
Ingres NCHAR(n), 1 ⇐ n ⇐ 16000, Unicode - UTF-8

Related Data Types in Oracle

Data Types
Fixed-length Character Data CHAR(n)
Variable-length Character Data VARCHAR2(n) NVARCHAR2(n)
Character Large Objects CLOB NCLOB LONG

All Data Types


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