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What is data independence?
Data Independence: Techniques which permit data to be changed without affecting the applications in which procedure it. There are two types of data independence. The first type is data independence for data that is accomplished in a database management system (DBMS). It permits the database to be structurally changed without affecting most existing programs. Programs access data in a DBMS through field and are concerned with just the data fields they use, not the format of the finished record. Therefore, when the record layout is updated (fields added, deleted or changed in size), the only programs which must be changed are those in which use those new fields.
Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s
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Critically explained the benefits and limitations of different database technologies with proper examples
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give some example real-life situations where DBMS are most suiitabe
3. (10 points) Assume that you have been presented with the following relation for the Baxter Aviation database: Charters (Pilot#, Pilot name, Aircraft ID#, #seats, Village, Fligh
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
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