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The complement of a set is the difference between that set and the Universal set. So the complement is only a special case of a difference.
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The different types of sets are- subset null set finiteandinfiniteset
select, project, and join
huh
The cardinality of finite sets are the number of elements included in them however, union of infinite sets can be different as it includes the matching of two different sets one by one and finding a solution by matching the same amount of elements in those sets.
There are three different kinds of sets according to the relationship. The three different kind of sets according to the relationship are binary relationship set, ternary relationship set, and relationship set with abbreviated name.