An alias for a supertable
An alias is a word that immediately follows
the name of a table in the FROM clause. You can specify an alias for
a typed table in a SELECT or UPDATE statement and then use the alias
(in the same SELECT or UPDATE statement) as an expression by itself.
If you create an alias for a supertable, the alias can represent values
from the supertable or the subtables that inherit from the supertable.
In DB-Access,
the following query returns row values for all instances of the person, employee,
and sales_rep tables.
does not recognize this construct. In programs, the query returns an error.