• In ORACLE, char[(n)] represents variable strings of characters of length
n, where 1 ≤ n ≤ 32767; the default value of n is 1. The domain charac-
ter is the same as char. The characters and their order are determined
by the system during the installation of the DBMS.
The domain varchar(n) requires n to be specified and also represents
variable-length strings of characters. It is the intention of ORACLE to
separate char(n) from varchar(n) in future releases: char(n) will repre-
sent fixed-length strings while varchar(n) will represent variable-length
strings.