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Oracle Data Types - NVARCHAR2

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

Oracle - NVARCHAR2
Syntax NVARCHAR2(n)
Data Variable-length character data in Unicode - UTF-8 or UTF-16
Parameters n is the maximum number of characters
Range 1 ⇐ n ⇐ 4000/charsize
Default n is mandatory
Padding Not right-padded with spaces to n
Trailing Spaces Not removed when the value is stored and retrieved
Empty String '' is treated as NULL
Error Handling Error is raised if the value is too long
Storage Size Actual entry length
Standards Oracle Extension

Oracle NVARCHAR2 - Equivalents in Other Databases

Database Data Type and Conversion
SQL Server NVARCHAR(n | max), 1 ⇐ n ⇐ 8000, 2G if max is specified
MySQL NVARCHAR(n), 1 ⇐ n ⇐ 21845, Unicode - UTF-8
PostgreSQL VARCHAR(n), 1 ⇐ n ⇐ 1G
Sybase ASE NVARCHAR(n), 1 ⇐ n ⇐ pagesize/@@ncharsize (page size is 2K, 4K, 8K or 16K); UNIVARCHAR(n), 1 ⇐ n ⇐ pagesize/@@unicharsize, Unicode
Informix NVARCHAR(n,r), 1 ⇐ n ⇐ 255, LVARCHAR(n), 1 ⇐ n ⇐ 32739
HP Neoview NVARCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns)
Ingres NVARCHAR(n), 1 ⇐ n ⇐ 16000, Unicode - UTF-8; LONG NVARCHAR, 2G, Unicode - UTF-8

Related Data Types in Oracle

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

All Data Types

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