Use temporal qualifiers
to specify time criteria for selecting data from temporal tables.
that you specify in a LIBNAME statement apply only to that Teradata
session and are implemented through session commands that are issued
at connect time. For example, if you specify TEMPORAL_QUALIFIER='AS
OF PERIOD '(1999-01-01, 2099-01-05)' ' in a LIBNAME statement, below
is the Teradata SET SESSION command that is issued at connect time.
The SQL is submitted as usual.
.SET SESSION ASOF PERIOD '(1999-01-01, 2099-01-05)'