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What is Disadvantages Of DBMS ?
1. Cost of Software and Hardware and Migration - A important disadvantage of the DBMS system is cost.
2. Reduced Response and Throughput - The procedure overhead introduced through the DBMS to implement integrity, security, and sharing of the data causes a degradation of the response and throughput times.
3. Problem with Centralization - Centralization also means in which the data is accessible from a single source namely the database. This increases the potential of security breaches and disruption of the operation of the organization since of failures and downtimes.
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
The basic merits of decomposition. The Advantages of Decomposition 1. Separate person can work on each subsystem. 2. A particular software engineer can specialize in a
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
Consider the subsequent relation Professor (Pfcode, dept, head, time) It is assumed that (i) A professor can work in much more than one
What are the requirements to ensure the objectives of file management principle is realized?
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
Define multivalued dependency. What do understand by trivial multivalued dependency? Ans: A multivalued dependency is a full constraint among two sets of attributes in a rela
Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
Implementation and SQL Applications
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