DATA BASE MANAGEMENT SYSTEMS (DBMS)

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DATA BASE MANAGEMENT SYSTEMS (DBMS)

Data

Data are raw facts or figures about people, objects, or events that can be stored and processed by a computer. By themselves, data usually have little meaning until they are organized or interpreted.
Example: Student name = "Ali", Age = 21.

Metadata

Metadata are “data about data.” They describe the structure, meaning, or properties of the actual data, helping systems understand how to store, manage, and use the data.
Example: In a Students table —

  • Column name: Age

  • Data type: INTEGER

  • Size: 3

In simple terms:

  • Data = the actual values

  • Metadata = information that describes those values


Information
Information is processed, organized, and meaningful data that is useful for decision-making. When raw data is interpreted and given context, it becomes information.

Example:

  • Data: Student marks = 85, 90, 78

  • Information: The student’s average mark is 84.3 and the student has passed.

 In simple terms:

  • Data = raw facts

  • Information = meaningful results derived from data




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