Sybase ASE Data Types - VARCHAR

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

Sybase ASE - VARCHAR
Syntax	VARCHAR[(n)]
Data	Variable-length character data, single-byte and multibyte character sets
Parameters	n is the maximum number of bytes, optional
Range	1 ⇐ n ⇐ pagesize (2K, 4K, 8K or 16K)
Default	n is 1
Padding	Not right-padded with spaces to n
Trailing Spaces	Removed when the value is stored
Empty String	“” is stored as a single space “ ”
Error Handling	Exceeding data truncated without warning if set string_rtruncation off specified (default), otherwise an error is raised
Storage Size	actual entry length
Synonyms	CHAR VARYING, CHARACTER VARYING
Standards	ANSI SQL

Sybase ASE VARCHAR - Equivalents in Other Databases

Database	Data Type and Conversion
Oracle	VARCHAR2(n), 1 ⇐ n ⇐ 4000/charsize
SQL Server	VARCHAR(n \| max), 1 ⇐ n ⇐ 8000, 2G if max is specified
MySQL	VARCHAR(n), 1 ⇐ n ⇐ 65535/charsize
PostgreSQL	VARCHAR(n), 1 ⇐ n ⇐ 1G
Informix	VARCHAR(n,r), 1 ⇐ n ⇐ 255, LVARCHAR(n), 1 ⇐ n ⇐ 32739
HP Neoview	VARCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns)
Ingres	VARCHAR(n), 1 ⇐ n ⇐ 32000

Related Data Types in Sybase ASE

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

All Data Types

Oracle

SQL Server

IBM DB2

MySQL

PostgreSQL

Sybase ASE

Sybase ASA

Informix DS

Teradata

HP Neoview

Interbase/Firebird

Ingres