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Problem
1 What is a Data Warehouse? Mention its advantages
2 Explain the Top-Down and Bottom-up Data Warehouse development Methodologies
3 What is Data Transformation? Explain the tasks involved in it
4 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples
Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
random file orgnization
Why does a DBMS query language is designed? A DBMS query language is designed to support end users who use English-like commands. support in the development of complex applicat
What are wait-for-graphs?Give the algorithm to construct a wait-for-graph from a given schedule of transactions? How can deadlocks be detected from wait-for-graphs? Ans: The
What is schema
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
What are segments in oracle? Segments - Each table has single field of disk space, known as segment, set aside for it in the tablespace. Segments consist of contiguous sections
Describe Interfaces for the DBA? Interfaces for the DBA - Most database systems holds privileged commands which could be used only through the DBA's staff. These involves com
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
Can you assist me in Database management system? I need help in my courses, please email me at and get back me soon...
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