ALTER TABLE employee
ADD (emp_bldg REF building) What doesREF keyword means in the above statement?

Options
- The column will contain only a reference to a building object
- The column will not contain a reference to a building object
- The column will contain the building object itself
- None of the above

CORRECT ANSWER : The column will contain only a reference to a building object

Discussion Board
REF keyword

REF takes as its argument a correlation variable (table alias) associated with a row of an object table or an object view. A REF value is returned for the object instance that is bound to the variable or row.

Prajakta Pandit 02-22-2017 10:56 PM

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