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MySQL Data Types - NVARCHAR
Versions: MySQL 5.x, 4.x and 3.23
MySQL - NVARCHAR | |
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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 |
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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