DAD-220 Module 2
with complete verified
solutions
Relational Model - answer A model based on mathematical
principle.
1. A data structure that prescribes how data is organized
2. Operations that manipulate data structures
3. Rules that govern valid relational data
Domain - answer A named set of possible database values, such as
integers, dictionary words, or logical values
Tuple - answer A finite sequence of values, each drawn from a fixed
domain. Ex: (3, apple, True)
Relation - answer A named set of tuples, all drawn from the same
sequence of domains
Attribute - answer Each tuple position is called an attribute and
given a unique name
Mathematical Operations of Set Theory - answer Union, Difference,
Projection, Selection, Join, Product
Relational rules (integrity rules) - answer Logical constraints that
ensure data is valid and conforms to business policy
with complete verified
solutions
Relational Model - answer A model based on mathematical
principle.
1. A data structure that prescribes how data is organized
2. Operations that manipulate data structures
3. Rules that govern valid relational data
Domain - answer A named set of possible database values, such as
integers, dictionary words, or logical values
Tuple - answer A finite sequence of values, each drawn from a fixed
domain. Ex: (3, apple, True)
Relation - answer A named set of tuples, all drawn from the same
sequence of domains
Attribute - answer Each tuple position is called an attribute and
given a unique name
Mathematical Operations of Set Theory - answer Union, Difference,
Projection, Selection, Join, Product
Relational rules (integrity rules) - answer Logical constraints that
ensure data is valid and conforms to business policy
