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MySQL Data Types - NCHAR

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

MySQL - NCHAR
Syntax NCHAR[(n)]
Data Fixed-length character data in the predefined character set - UTF8
Parameters n is the maximum number of characters, optional
Range 0 ⇐ n ⇐ 255
Default n is 1
Padding Right-padded with spaces to n
Trailing Spaces Removed when the value is retrieved if PAD_CHAR_TO_FULL_LENGTH SQL mode is not specified. Trailing spaces are insignificant in comparisons, primary and unique keys
Empty String CHAR(0) is allowed that can store 2 values: '' (empty string) and NULL
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 n bytes
Notes NCHAR is equivalent to CHAR CHARACTER SET UTF8
Synonyms NATIONAL CHAR, NATIONAL CHARACTER
Standards ANSI SQL

MySQL NCHAR - Equivalents in Other Databases

Database Data Type and Conversion
Oracle NCHAR(n), 1 ⇐ n ⇐ 2000/charsize, Unicode - UTF-8 or UTF-16
SQL Server NCHAR(n), 1 ⇐ n ⇐ 4000, Unicode - UCS-2
IBM DB2 GRAPHIC(n), 1 ⇐ n ⇐ 127, double-byte
PostgreSQL CHAR(n), 1 ⇐ n ⇐ 1G
Sybase ASE NCHAR(n), 1 ⇐ n ⇐ pagesize (2K, 4K, 8K or 16K), Character set - database default
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 MySQL

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

All Data Types


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