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DBMS Interview Questions and Answers

Ques. What is “CROSS JOIN”? or What is Cartesian product?
Ans.
CROSS JOIN” or “CARTESIAN PRODUCT” combines all rows from both tables. Number of rows will be product of the number of rows in each table. In real life scenario I can not imagine where we will want to use a Cartesian product. But there are scenarios where we would like permutation and combination probably Cartesian would be the easiest way to achieve it.
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