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What is E-R model?
This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a database by a set of attributes.
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
A file manipulation command that extracts some of the records from a file is called ? A file manipulation command that extracts some of the records from a file is called SELECT
What is multiple relationship ?
Describe Dynamic Model. The dynamic model specifies allowable sequences of changes to the objects from an object model. It contains event trace diagrams describing scenarios. A
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Question (a) Differentiate between the following terms: (i) Distributed Database v/s Distributed Database management System (ii) Homogeneous Distributed Database v/s Hete
Speedup Query Processing: A query that includes data at various sites can be split into sub-queries. These sub- queries can be implemented in parallel by various sites. Such parall
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