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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.
We have a new website where I need someone to 1: Inhabit the back end with all the recruitment agencies in the UK. I require someone who is not manually going to do this, but who w
The Form input elements are: Reporter name text type input Password
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What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
note on hashing technique
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Which database level is closest to the users? External database level is closest to the users.
Shared lock or Read Lock It is requested by a transaction that needs to just read the value of data item. A shared lock on a data item does not permit an exclusive lock
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