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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
Name the various privileges in SQL? A) Delete B) Select C) Insert D) Update
Insulation between conceptual and physical structures It can be defined as: 1. The Database Administrator should be capable to vary the storage structures without affectin
How can we Classify the operations on classes This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
What are the advantages of by using an index and what are its disadvantages ? In difference, if the search key of a secondary index is not a candidate key, it is not sufficient
what is relationship inheritance and attribute inheritance
What are the advantages of creating a table from existing table?
What is the need for triggers? Triggers are useful mechanisms for alerting humans or for starting particular tasks automatically when particular conditions are met.
Produce a set of relations (equivalent to the Finkelstein entity list) in third normal form (3NF) from the following un-normalised relation. You must use the Finkelstein methodolog
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