The fraction is stored to 6 decimal places. A TIMESTAMP value requires 8 bytes of storage.
Although the range of possible dates for the TIMESTAMP data type is the same as the DATE type (covering years 0001 to 9999),
the useful range of TIMESTAMP date types is from 1600-02-28 23:59:59 to 7911-01-01 00:00:00. Before and after this range the
time portion of the TIMESTAMP may be incomplete.
When a TIMESTAMP value is converted to TIMESTAMP WITH TIME ZONE, the connection's time_zone_adjustment setting is used for
the time zone offset in the result. In other words, the value is considered to be "local" to the connection. When a TIMESTAMP
WITH TIME ZONE value is converted to TIMESTAMP, the offset is discarded.
When the precision of the TIMESTAMP is dropped, built-in functions that pertain to minutes or seconds will produce meaningless