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education.
explain thee diffrent types of data models
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Question: In relation to distributed database answer the following questions: (i) Give a brief definition of distributed database. Support your answer with an appropriate di
What are composite attributes? Composite attributes can be separated in to sub parts.
Explain the three data models namely relational, network and hierarchical and evaluate their relative advantages and disadvantages. Hierarchical Model: In hierarchical model, da
Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
Compare the two log-based recovery schemes in terms of ease of implementation and overhead cost. Ans: There are two types of log based recovery techniques: deferred update
How to reduce data redundency
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