Which of the following data model is more flexible?
Correct answer: C. Data relational model
- A. Network data model
- B. Data Hierarchical Model
- C. Data relational model
- D. Object data model
Explanation
The relational data model is generally considered more flexible than the hierarchical and network data models. In the relational model, data is organized into tables (relations) consisting of rows and columns. This structure allows for more flexible querying and manipulation of data compared to the hierarchical and network models, which have more rigid structures.
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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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