Qui a raison ?

http://sheikyerbouti.developpez.com/pl_sql/?page=Chap2#L2.2
LONG
Chaîne de caractères de longueur variable avec au maximum 32760 octets
http://download-west.oracle.com/docs...ypes.htm#10531
You use the LONG datatype to store variable-length character strings. The LONG datatype is like the VARCHAR2 datatype, except that the maximum size of a LONG value is 32760 bytes.

http://www.techonthenet.com/oracle/datatypes.php
long Up to 2 gigabytes. Up to 2 gigabytes. Variable-length strings. (backward compatible)
CDLT.