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What is a Name?
A user-supplied name is used for identity. This form of identity is used for files in file systems. The user gives every file a name that uniquely identifies it, regardless of its contents.
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Insulation between conceptual and physical structures It can be defined as: 1. The Database Administrator should be capable to vary the storage structures without affectin
Event Occurrence of a process is called event. In other words, the object can receive many input instructions. The changes which occur due to these instructions are known as e
What are the storage types? The storage types are: a) Volatile storage b) Nonvolatile storage
Differentiate between various levels of data abstraction? Data Abstraction - Abstraction is the procedure to hide the irrelevant things from the users and represent the rele
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
Consider a typical sales invoice that would include the following information. Design a single table to hold all of the information required to store an invoice including this info
What benefits can a company gain by managing its own information infrastructure and servicea
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
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