Thanks for the answers.
My query is selecting records on Oracle 11G database, based on some attributes and timestamp.
I know that it's very strange, infact also comparing SQL developer and TOAD oracle client they result (same query) different output.
I don't know how this difference could happen, but at the moment i would like to try changing connection string from DBI to Java one if exist (i would like to set into perl script a new database connection like sql developer client do).
Thanks.
Regards,
Fabrizio