Question

why data modelling is neccesary​

Answer 1

Explanation:

data modelling

The primary goal of using data model are: Ensures that all data objects required by the database are accurately represented. Omission of data will lead to creation of faulty reports and produce incorrect results. A data model helps design the database at the conceptual, physical and logical levels.

Answer 2

Data modeling is the process of creating a data model for the data to be stored in a Database. This data model is a conceptual representation of

• Data objects
• The associations between different data objects
• The rules.

Data modeling helps in the visual representation of data and enforces business rules, regulatory compliances, and government policies on the data. Data Models ensure consistency in naming conventions, default values, semantics, security while ensuring quality of the data.