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A bitemporal nested query language, BTN-SQL, is ...
A bitemporal nested query language, BTN-SQL, is
proposed in this paper. BTN-SQL attempts to fill some gaps
present in currently available SQL standards. BTN-SQL
extends the well-known SQL syntax into two directions, the
user-friendliness support of nested relations and the effective
support of bitemporal data. The schema of a bitemporal nested
database is difficult to be understood since it is complicated
by nature; therefore, an extended approach of the Entity-
Relationship model, the BTN-ER model, is also proposed for
modelling complex bitemporal nested data.