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Informix Dynamic Server (IDS) Data Types - NCHAR

Versions: Informix Dynamic Server 11.x, 10.x, 9.x and 7.x

Informix DS - NCHAR
Syntax NCHAR[(n)]
Data Fixed-length character data in the specified collation, single-byte and multibyte character sets
Parameters n is the maximum number of bytes, optional
Range 1 ⇐ n ⇐ 32767
Default n is 1
Padding Right-padded with spaces to n
Error Handling Exceeding data truncated without warning
Storage Size n bytes
Synonyms NATIONAL CHAR, NATIONAL CHARACTER
Standards ANSI SQL

Example:

CREATE TABLE t_nchar (c1 NCHAR(11));

Informix DS 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
MySQL NCHAR(n), 0 ⇐ n ⇐ 255, Unicode - UTF-8 and TEXT or VARCHAR(n), if n > 255
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
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 Informix

Data Types
Fixed-length Character Data CHAR(n)
Variable-length Character Data VARCHAR(n,r) NVARCHAR(n,r) LVARCHAR(n)
Character Large Objects TEXT CLOB

All Data Types


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sqlways/informix/data-types/nchar.txt · Last modified: May 07, 2018, 03:15:26 PM (external edit)
 
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