ASCII Collation
The ASCII collation sequence and the EBCDIC collation sequence are always available.
ASCII collation orders the data in the same way as converting the data to Teradata extended ASCII (the LATIN server character set) and then using a binary ordering on the resulting byte string.
EBCDIC Collation
EBCDIC collation is functionally equivalent to converting the data to Teradata extended EBCDIC and then using a binary ordering on the resulting bytes.
Default Collation
If the COLLATION parameter is not defined, the default is HOST (the collation that is compatible with the logon client).
HOST collation gives you ASCII collation on network-attached clients and EBCDIC collation on mainframe clients.