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What is data model? Explain object based and record based data models?
Ans: A data model is an abstract model in which describes how data is represented and accessed.
(i) Object based data models: Same to a relational database model, but objects, classes and inheritance are directly supported within database schemas and in the query language
(ii) Record based data models: is a database model based on first-order predicate logic. Its core idea is to elaborate a database as a collection of predicates over a finite set of predicate variables, describing constraints on the possible values and combinations of values.
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 model is an ex
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
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
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
What does Aggregation mean?
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
What are the benefits of document scanning? Document scanning, in addition to being cost-efficient, also enhances productivity. This service enhances security as you set the pa
You are to write a property management database program that allows a real estate agent to view, add, search, and save property listings. The program is to do the following: 1.
Attributes and its types explain?
data models are being replaced over years. Reasons and why does that happen?
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