Database Modal
- 4. Types of Architecture Model There is two types of Model Client-server Model Peer-to-Model
- 5. Client-Server Model client-server Model is two level architecture. First is a Client And Second is a Server. In which functionality is divided between server and client computer
- 6. Client-Server Model Server is responsible for data Management Query processing Transection management Query Optimization
- 7. Client-Server Model client is responsible for User interface Consistency control Transaction management Error free
- 8. Type of Client-Server Model There are two types of Client Server Model Single server-multiple client Multiple server-multiple client
- 9. Single server-multiple client In single server-multiple client, the single server are commination to the multiple client
- 10. Single server-multiple client ie Application software Client services Communication managemrnt Application software Client services Communication managemrnt Application software Client services Communication managemrnt Client n Server 1 Client 1 Communication line
- 11. Multiple server-multiple client In multiple server-multiple client, the multiple server are commination to the multiple client
- 12. Multiple server-multiple client ie Application software Client services Communication management Application software Client services Communication management Communication management Database services Client n Server 1 Client 1 Communication management Database services Server n Communication line
- 13. Peer-to-Peer Model In this architecture, each computer act as both server and client for providing database serves.
- 14. Peer-to-Peer Model Four level schema is used in peer-to- peer architecture Global conceptual schema internal schema Conceptual schema External schema
- 15. Peer-to-Peer Model Global conceptual schema The global conceptual schema is depict the global logical view of data.
- 16. Peer-to-Peer Model Internal schema Internal schema describe the physical structure of database and access path to data. physical structure mean how data is stored in database
- 17. Peer-to-Peer Model Conceptual schema Conceptual schema describe the whole structure of database while hiding the detail of physicals structure. It specify different entities, there relationship and construct specify on data.
- 18. Instruction Set Architecture External schema External schema is used to describe the user view or user interface.
- 19. Peer-to-Peer Model External schema nExternal schema 2 Global Conceptual Schema Conceptual schema 1 Conceptual schema 2 Conceptual schema n internal schema 1 internal schema 2 internal schema n External schema 1 Ie
- 21. کرو جاندی