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what are the reasons having variable length records
Define seek time. The time for repositioning the arm is known as the seek time and it enhances with the distance that the arm is known as the seek time.
Saving Derived Attributes to Avoid Re-computation Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define
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What are attributes? Give examples. An entity is shown by a set of attributes. Attributes are descriptive properties possessed by every member of an entity set. Example: pos
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Write short notes on tuple relational calculus. The tuple relational calculation is anon procedural query language. It defines the desired information without giving a particul
After going by the database architecture, let us now dwell on an important query: how is the data organised in a database? There are a lot of basic structures that exist in a datab
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
Why older data models are being replaced by new data modelling 100 words accepted#
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