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What is the use of sub queries? A sub query is a select-from-where expression that is nested with in another query. A common use of sub queries is to do tests for set membershi
What is storage manager? A storage manager is a program module that gives the interface among the low level data keeps in a database and the application programs and queries su
When every condition appears with equality condition (=) only. c) Natural join (denoted by R*S) When two join attributes have the similar name in both relations. (Tha
explain cascading rollback
Problem 1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples 2 Explain the following performance tuning techn
Differentiate between natural join and outer join? Natural join is a binary operator which is written as (R * S) where as R and S are relations. The output of the natural join
limitations and benefits in database tecknowlagy
I have a small project that contains 3 deliverable s. I have done the first one and I would like you to help me with second one
why shadow copy technique is used?
Which database level is closest to the users? External database level is closest to the users.
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