What is a virtual database? What are the advan tages and disadvantages of using a virtual database?
Answer to relevant QuestionsWhat is data modeling? What is its purpose? Briefly describe three commonly used data models.What is data mining? What is OLAP? How are they different? Develop a simple data model for the music you have on your digital music player or in your CD collection, where each row is a song. For each row, what attributes should you capture? What will be the primary key for the ...Briefly describe the differences between a circuit-switching and packet-switching network.What distinguishes 3G from 4G communications?Identify three 4G communications standards.
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