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why three level architecture had been developed/
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
List the drawbacks of relational database system A) Repetition of data B) Inability to s certain information.
Question: Describe briefly the three parts of the Relational Model. (a) The term integrity refers to the accuracy or correctness of the data in the database. Define the fol
What are segments in oracle? Segments - Each table has single field of disk space, known as segment, set aside for it in the tablespace. Segments consist of contiguous sections
Explain Deadlock detection and recovery Deadlock Detection - A deadlock is said to take place when there is a circular chain of transaction, every waiting for the release of a
what is Mapping Constraints? with examples
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Design an EER schema for the following application and translate the EER schema into relational schemas (and constraints). It is possible that some requirements cannot be captured
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