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Limitations of File Based System
The file-based system has some limitations. The limitations are listed as follows:
Besides the above, the maintenance of the File Based System is complex and there is no provision for security. Recovery is non-existent or inadequate.
We will explain here an example database application having COLLEGE database and use it in showing several E-R modelling concepts. College database remains track of faculty, Stu
A distributed transaction consists of subtransactions that execute at different sites and access local DBMSs at those sites. For example, a distributed transaction that transfers m
what is natural join?
Write a short note on QBE? Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running da
(a) What is a Sub-Query? (b) What is the difference between a scalar sub-query and a tabular sub-query? (c) Write an equivalent SQL statement to get the Name of Product wh
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
what is meant semantic query optimization? how does it differ from other query optimization techniques?
Write A short note on temporary tables? Temporary Tables - Temporary tables exists solely for a particular session, or whose data persists for the duration of the transaction
What sorts of tables one can se in designing the hierarchy of a LDB? Tables, which are having Foreign Key relations.
In object oriented design, which steps must designer take to adjust inheritance? To readjust inheritance following steps should be taken: i) Rearrange and adjust the classe
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