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explain thee diffrent types of data models
The dataset " CFOLYMPICS.XLS " contains the observations used in the above article. The definitions of the variables are also included in this spreadsheet. However, for the purpo
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
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What is Alternate Key Alternate Key: This is the candidate key which is not taken as the primary key of the table. They are named so because although not the primary key, the
What is conceptual model ? A conceptual model is a independent of both hardware and software.
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
What is OLAP? OnLine Analytical Processing (OLAP) is a Business Intelligence (BI) reporting system. OLAP gives the user with the capability to sum, count, average and do other
Explain the Check Clause The CHECK clause is employed to at the end of a CREATE TABLE statement specify table constraints. This is known as table-based constraint because it ap
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