What data types and data lengths does TDE support?
For TDE tablespace encryption, there are no limitations in terms of supported data types; the following data types can be encrypted using TDE column encryption: varchar2 (< 3933 characters) nvarchar2 (< 1967 characters) char (< 1933 characters) nchar (< 967 characters) number raw binary_float binary_double timestamp date SecureFile (11gR1 and later)