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What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
What is the meaning of Data Independence ?
Write a short note on oracle Instance? Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data s
definition and its work
Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following
What sorts of tables one can se in designing the hierarchy of a LDB? Tables, which are having Foreign Key relations.
Construct a generalization-specialization hierarchy for a motor-vehicle sales company. The company sells motorcycles that comprise an engine number and cost; cars that have a chass
a brief definition
what is Nested relational model? Explain with examples.
The PROJECT operation The project operation is used to choose the records with specified attributes as discarding the others based on some related criteria. This is denotes as ∏
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