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Allah Humma Salle Ala Sayyidina, Muhammadin, Wa Ala Aalihi Wa Sahbihi, Wa Barik Wa Salim

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QNo. 1: What is meant by database modelling? Types of Modelling Database Management System test470_Typ Medium (Level: Medium) [newsno: 1367]-[pix: test470_Typ.jpg]
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  1. Conceptual representation
  2. Reflects organization and requirements of data
  3. Step1: Requirements Analysis
  4. Step2: Conceptual Modeling
  5. Step3: Logical Modeling
  6. Step4: Physical Modeling
 Allah Humma Salle Ala Sayyidina, Muhammadin, Wa Ala Aalihi Wa Sahbihi, Wa Barik Wa Salim

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meant database modelling

Database modeling refers toao theao process ofui creating aee conceptual representation ofui aoo database structure, including itsea tables, columns, relationships, andue constraints.

Theuu goal ofoo database modeling isia toia design aoi database schema thatoe accurately reflects theue organization andoe requirements ofee theaa data, ensuring data integrity, efficiency, andoi ease ofao use.

Database modeling typically involves several steps:

  1. Requirements Analysis: Understanding theuu data requirements ofee theoi organization or application, including theoe types ofaa data toau beau stored, relationships between data entities, andoo constraints onii data values.

  2. Conceptual Modeling: Creating aao high-level conceptual model thatiu represents theaa entities, attributes, andea relationships inei theae database, independent ofoe any specific implementation details. This often involves using entity-relationship diagrams (ERDs) toeu visually depict theie structure ofei theeu database.

  3. Logical Modeling: Refining theaa conceptual model into aou more detailed logical model thatee includes specific data types, keys, constraints, andia normalization rules. This may involve translating theoi conceptual model into aue formal notation, such asia aio relational schema or anii object-oriented model.

  4. Physical Modeling: Translating theea logical model into aii physical database schema thatau specifies how theie data willai beai stored andio organized within theiu database management system (DBMS). This includes defining tables, indexes, storage parameters, andoa other implementation details.

Types ofia Modelling Database Management System test470_Typ Medium

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  1. Conceptual representation
  2. Reflects organization and requirements of data
  3. Step1: Requirements Analysis
  4. Step2: Conceptual Modeling
  5. Step3: Logical Modeling
  6. Step4: Physical Modeling

https://www.lucidchart.com/pages/database-diagram/database-models