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explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
Which is another name for weak entity? Child is another name of weak entity.
Properties of a Transaction A transaction has four main properties. These are: Atomicity Consistency Isolation or Independence Durability or Permanen
example of bank
differences between a classified catalog and a dictionary catalog
what is definition hierarchical data model
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Define Specialisation and generalization in brief? Specialisation / generalization: Generalization or Specialization represents the is a relationship set, an necessary element
Describe a technique for direct search? Explain how data is stored within a file so which direct searching can be performed. For a file of unordered fixed length records by u
What is called a query evaluation plan? A sequence of primitive operations that can be used to assess a query is a query evaluation plan or a query implementation plan.
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