Last modified on 27 February 2015, at 11:05

SQL Dialects Reference/Data structure definition/Data types/Character types

Character typesEdit

This page includes comparison tables which can be big and complex.

While it's perfectly all right to view them in their complete state, it is recommended to install a comparison tables extension that would allow to select particular columns of interest for comparison.

SQL version Feature Standard
SQL:2011
DB2 Firebird Ingres Linter MSSQL MySQL MonetDB Oracle
Vers. 11.x
PostgreSQL SQLite Virtuoso
 ? Variable-length with limit VARCHAR(n) VARCHAR(n) VARCHAR(n) VARCHAR(n)
NVARCHAR(n)
VARCHAR(n)
NVARCHAR(n)
VARCHAR[(n or max)]
NVARCHAR[(n or max)]
VARCHAR(n) VARCHAR(n)
CHARACTER VARYING(n)
VARCHAR2(n)
VARCHAR(n) is slated for deprecation
character varying(n)
varchar(n)
VARCHAR(n) VARCHAR(n)
 ? Variable-length with limit, max size no limit  ? 32765  ?  ? 2 GB with (max) or 8000 with the fixed limit 65535 about 2 GB 4000 bytes (32767 bytes if MAX_STRING_SIZE = EXTENDED - Oracle 12G) about 1 GB no limit (enforced by global, default = 1M)  ?
 ? Fixed-length, blank padded string CHAR(n) CHAR(n) CHAR(n) CHAR(n)
NCHAR(n)
CHAR(n)
NCHAR(n)
CHAR(n)
NCHAR(n)
CHAR(n)  ? CHAR(n) character(n)
char(n)
CHAR(n) CHAR(n)
 ? Fixed-length, blank padded string, max size no limit  ? 32767  ?  ? 8000 255  ? 2000 about 1 GB  ?  ?

Notes: