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MySQL Data Types - NVARCHAR

Versions: MySQL 5.x, 4.x and 3.23

MySQL - NVARCHAR
Syntax NVARCHAR(n)
Data Variable-length character data in the predefined character set - UTF8
Parameters n is the maximum number of characters, optional
Range 1 ⇐ n ⇐ 21845 (65535 bytes is the maximum row size shared among all columns)
Default n is mandatory
Trailing Spaces Not removed when the value is stored and retrieved. But trailing spaces are insignificant in comparisons, primary and unique keys
Error Handling Exceeding data truncated and a warning is generated if strict SQL mode is not enabled, otherwise in case of non-space characters truncation, an error is raised
Storage Size Actual entry length
Synonyms NATIONAL VARCHAR, NATIONAL CHAR VARYING, NATIONAL CHARACTER VARYING
Standards ANSI SQL

MySQL NVARCHAR - Equivalents in Other Databases

Database Data Type and Conversion
Oracle NVARCHAR2(n), 1 ⇐ n ⇐ 4000/charsize, Unicode - UTF-8 or UTF-16
SQL Server NVARCHAR(n | max), 1 ⇐ n ⇐ 8000, 2G if max is specified, Unicode - UCS-2
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

Related Data Types in MySQL

Data Types
Fixed-length character data CHAR(n) NCHAR(n)
Variable-length character data VARCHAR(n) TINYTEXT TEXT MEDIUMTEXT
Character large objects LONGTEXT

All Data Types


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