Which of the following represent a collection of concepts that are used to describe the structure of a database?
Correct answer: B. Data model
- A. Data warehouse
- B. Data model
- C. Data structure
- D. Data type
Explanation
A data model is a conceptual representation of the structure of a database, describing the relationships between different data elements and how they are organized and accessed. It defines the rules and constraints that govern the storage, manipulation, and retrieval of data in a database system. Common types of data models include the relational model, hierarchical model, network model, and object-oriented model, each with its own way of organizing and representing data.
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Databases cover tables, records, fields, keys and relationships, together with database management systems and relational database design. The subject includes primary and foreign keys, normalization, SQL commands such as SELECT, INSERT, UPDATE and DELETE, queries, forms and reports, while distinguishing a database from a spreadsheet used for simple tabular data.
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