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What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
This assignment is worth 45% of your final grade for this module. Marks will be awarded as follows: Prototypes (wireframe and web based prototype) You are expected
Determine the method of Choosing Algorithms In general, most of operations are easy and have a satisfactory algorithm since description of what is to be done also shows how i
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
Spanned and unspanned organisation? Spanned and unspanned organization: If records are not permited to cross block boundaries then the organisation is called unspanned record
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
There are two major types of fragmentation: Horizontal& Vertical. Horizontal fragments, as the name suggests are subsets of tuples and vertical fragments are subsets of attributes
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
What is recovery management component? Ensuring durability is the responsibility of a software component of the base system known as the recovery management component.
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