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Define- relational algebra.
The relational algebra is a procedural query language. It having of a set of operations that take one or two relation as input and make a new relation as output.
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
assume we have the following apllicationthat model sccer team the games they play and the players inv each teamin the design we want to capture
Problem : (b) A deductive database system is essentially the outcome of applying mathematics logic to database management, where logic is used for both data representation and
What are the physical characteristics of magnetic disks? Ans: A magnetic disk is a circular plate or platter of plastic or metal that is coated with magnetizable material lik
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Define average seek time. The average seek time is the average of the seek times, calculated over a sequence of random requests.
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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
Adding Redundant Associations for Efficient Access The expression redundant association means using "duplicate association for proficient access". While analysis, it is not a
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