Essay
To develop a theoretically pure relational database (that is completely consistent with relational model theory), how should relationships that have the following cardinality patterns be implemented into tables? Why?
(0,1) - (0,1)
(0,1) - (0,N)
(0,1) - (1,N)
(0,N) - (0,1)
(1,N) - (0,1)
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