what is outer join they can be employed while
What is Outer join?
They can be employed while we want to keep all the tuples in R, or all those in S or all those in both relations in the result of the JOIN in spite of of whether or not they have matching tuples in the other relation.
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what is outer join they can be employed while we want to keep all the tuples in r or all those in s or all those in both relations in the result
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