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The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
Briefly describe the different kinds of users of a DBMS. Ans: Different sorts of DBMS users are: (a) Software Engineers: These are the people accountable for developing ap
Explain retrieval in QBE? Retrieval in QBE : A "GUI" for expressing queries. Based on the Domain Relational Calculus (DRC) Actually invented before GUIs. Very co
What is Identity? Identity (or AutoNumber) is a column that automatically produces numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID
In object oriented design, which steps must designer take to adjust inheritance? To readjust inheritance following steps should be taken: i) Rearrange and adjust the classe
Provide Examples of different types of Time and Date formats. It's most common store dates using a dash (-) as a colon (:)and the delimiter as the time delimiter. The given fo
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
What are the functions of an accumulator? The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It hol
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
Design a gennalization and specialization hierarchy for an automobile sales company
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