Will you please tell me what is hash join and difference between hash join and nested loop. So which is better for optimizing the query.
I did not get the exact answer for this question.
Kindly assist me here, thanks in advance.
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What is use of HASHED TABLE?
Hashed table is useful when your have to work with very big internal table and to read it with "READ TABLE WITH KEY ..." The time access is constant ! Definition of a Hashed...