The Relational Algebra Operator Restrict Produces a Subset of Columns

question 71

True/False

The relational algebra operator restrict produces a subset of columns of the input table,while the operator project produces a subset of rows.

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Definitions:

Board Feet

Board feet is a unit of measure for the volume of lumber, calculated as width in inches times length in feet times thickness in inches, divided by 12.

Lumber Grades

The classification of lumber according to its quality and usability for different construction or manufacturing purposes.

Office Expenses

Costs associated with the daily operation of a business office, including supplies, utilities, and equipment maintenance.

Allocation Bases

Criteria or methods used to allocate costs among different departments, products, or activities in an organization.