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explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
Inheritance Adjustment As in object oriented analysis and design terms inheritance defines a relationship between classes, where as one class shares structure or behaviour def
Why is database redesign necessary? Database redesign is essential for two reasons. First, redesign is essential both to fix mistakes made during the initial database design. S
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel
The following variant of the primary copy asynchronous-update replication protocol has been proposed for totally replicated systems. (a) A transaction executing at site A updat
Describe the primary key functions? Primary Key : The primary key is an attribute or a set of attributes in which uniquely identify a specific example of an entity. Every entit
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
What is normalization? It is a method of analysing the given relation schemas based on their Functional Dependencies (FDs) and primary key to attain the properties (1).Minim
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