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Whst is logical schema ?
Logical schema is the entire database.
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
Define Aggregate functions and what aggregate functions supported by the MySQL To calculate a summary value from a set of individual values and uses one of the functions known
What are the three data anomalies that are likely to occur as a result of data redundancy? Can data redundancy be completely eliminated in database approach? Why or why not? A
What are composite attributes? Composite attributes can be separated in to sub parts.
Enumerate or state the steps in creating a relevant database of a shop.
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
want a idea for final year project
What is recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
what is the need of a log in dbms
Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among
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