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Explain retrieval in QBE?
Retrieval in QBE : A "GUI" for expressing queries.
But has influenced many projects Especially PC Databases: Paradox, Access, etc.
Write short note on Data models? Data models: A data model is an abstract model which elaborates how data is represented and accessed. The term data model has two commonly ac
Give the general form of SQL query? Select A1, A2............., An From R1, R2..............., Rm Where P
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
#questiontypes of keys examples..
What are the uses of functional dependencies? To test relations to see whether they are legal under a given set of functional dependencies. To state constraints on the set
What are composite attributes? Composite attributes can be separated in to sub parts.
Funky Festivals Specification Funky Festivals organise music festivals which take place at various venues throughout the UK. A venue needs to be booked before a Festival can t
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
The Form input elements are: Reporter name text type input Password
Define Physical and Logical independence Ans: Physical data independence: The ability to modify physical level without causing application program to be rewritten. Logic
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