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Define page.
The database is partitioned into some number of fixed-length blocks, which are referred to as pages.
explain normalisation
Your friend owns a computer store in Yuen Long, selling Desktop and Notebook PCs and other computer peripherals. Having been rather successful with his business there, he decided t
What are the various properties of Relational tables? Relational tables have 6 properties: 1. Each row is unique. 2. Column values are of the same kind. 3. Values are
Define the term Domain. For each n every attribute there is a set of permitted values known as the domain of that attribute.
A B-tree of order how much children m has maximum ? m has maximum m mchildren in a B tree.
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
List the requirements needed to design a trigger. The requirements are:- Specifying when a trigger is to be implemented. State the actions to be taken when the trigger im
What are the basic objects of the data dictionary? Tables Domains Data elements Structures Foreign Keys
Question : (a) Data mining is one of the best ways to analyse data and using software method, hidden and unexpected patterns and relationships in sets of data can be extracte
Explain the Natural join Natural join is a binary operator which is written as (R* S) in which R and S are relations. The effect of the natural join is the set of all combinati
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