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What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
The Third Normal Form (3NF) Even though, transforming a relation that is not in 2NF into a number of relations that are in 2NF take out many of the anomalies, it does not neces
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
write a database program for concurrency transaction in a bank
Example :; transfers transfer_amount from x's account to y's account ; Supposes x&y both accounts exist TRANSACTION (x, y, transfer_amount) Start transaction IF X AND Y
Explain what is Aggregation? Aggregation: Aggregation is an significant concept in database design whereas composite objects could be modelled during the design of database a
Farmer Bob, Farmer Jane and Farmer Jose run a cow farming co-op. For every cow they keep the cow’s name, age (or date of birth), breed and numbered plastic ear tag. The each of t
Server Control It is usual to control access to the data via the front end application, for example by displaying data as ‘read only'. This part of the assignment illustrates ho
difference between MIS and DSS
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
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