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Sybase ASE Data Types - NCHAR

Versions: Sybase Adaptive Server Enterprise 15.x, 12.5.x, 12.0 and 11.x

Sybase ASE - NCHAR
Syntax NCHAR[(n)]
Data Fixed-length character data, single-byte and multibyte character sets
Parameters n is the maximum number of characters, optional
Range 1 ⇐ n ⇐ pagesize/@@ncharsize
Default n is 1
Padding Right-padded with spaces to n only if NOT NULL
Character Set Database default
Empty String “” is padded with spaces to n
Error Handling Exceeding data truncated without warning if set string_rtruncation off specified (default), otherwise an error is raised
Storage Size n*@@ncharsize bytes
Internals If defined as NULL, it is automatically converted to NVARCHAR without warning
Notes The only difference between NCHAR and CHAR is that, in NCHAR, n is the maximum number of characters (storage size in bytes can be more than n),
while, in CHAR, n is the maximum number of bytes (less than n characters can be actually allowed)
Standards ANSI SQL

Sybase ASE 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 - UTF8 and TEXT or VARCHAR(n), if n > 255
PostgreSQL CHAR(n), 1 ⇐ n ⇐ 1G
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 Sybase ASE

Data Types
Fixed-length character data CHAR(n) UNICHAR(n)
Variable-length character data VARCHAR(n) NVARCHAR(n) UNIVARCHAR(n)
Character large objects TEXT UNITEXT

All Data Types

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