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Compare the Nested-loop join and block-nested loop join
Ans: Nested loop join - It is costly as worst case cost, no. of block accesses needed is nr * bs + br where bs and br denote no. of blocks containing ns and nr tuples of relations S and R, relevant and in best case there will be br + bs block accesses
Block-nested-loop join - In worst case no. of block accesses is br*bs + br. In best case, br +bs block accesses will be needed.
A step-wise distributed database design methodology Following is a step-wise methodology for distributed database design. (1) Examine the nature of distribution. Find out wh
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he SQL query that will return the order number, quantity ordered, price each and total cost of an order (quantity * price each) from the order details table. Label the calculated c
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The clause in SQL which specifies that the query result should be sorted in ascending or descending order based upon the values of one or much more columns is Ans : Order by
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