Thanks for all help! I just got this fixed by setting as below: 

my $date_conv = $odbh->prepare("ALTER SESSION SET NLS_DATE_FORMAT = 'Y
+YYY-MM-DD HH24:MI:SS'");
$date_conv->execute;

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In reply to Re^4: copying mysql table data to oracle table by CSharma
in thread copying mysql table data to oracle table by CSharma

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