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Explain the disadvantages of file oriented approach?
In the oriented approach Applications are designed in isolation. Design of application is optimized for one application. Independently established applications lead to data redundancy. Wasted storage space because of redundancy.
a. There is loss of data integrity since integrity checking is not automated.b. Difficulty in accessing data.c. Information is available only in reports.d. Data Isolation.e. Inadequate securityf. Limited Flexibilityg. High Maintenance cost.h. Each data file of an application is a separate entity.
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
Consider a relation s over the attributes A and B with the following characteristics: 5,000 tuples with 10 tuples per page A 2-level B+ tree index on attribute
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
Improved availability: The data in a distributed system may be replicated so that it is at more than one site. Thus, the failure of a node or a communication link does not necessar
what is query processing ,query optimization and performance turring?
Sequences Sequences: Automatically produce unique numbers Are sharable Are typically used to make a primary key value Replace application code Speed up t
Question: AirwaysCentre, an international airline booking company currently uses a relational database system for their operations, which includes the following relations: P
What is a state chart diagram? State diagrams (State Chart Diagram) explain all possible states that a particular object can get into, and how object's state changes as result
What is called a query -execution engine? The query implementation engine takes a query evaluation plan, implements that plan, and returns the answers to the query.
State about the Activity Diagram Activity diagrams show flow from one activity to other. It is an ongoing non atomic execution within a state machine. Activity finally results
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