This ER (Entity Relationship) Diagram represents the model of Computer Sales and Service Management System Entity. The entity-relationship diagram of Computer Sales and Service Management System shows all the visual instrument of database tables and the relations between Sales, Customers, Computer, Repairs etc. It used structure data and to define the relationships between structured data groups of Computer Sales and Service Management System functionalities. The main entities of the Computer Sales and Service Management System are Computer, Sales, Parts, Customers, Services and Repairs.
Computer Sales and Service Management System entities and their attributes :
- Computer Entity : Attributes of Computer are computer_id, computer_customer_id, computer_price, computer_company computer_type, computer_description
- Sales Entity : Attributes of Sales are sales_id, sales_customer_id, sales_amount, sales_type, sales_description
- Parts Entity : Attributes of Parts are part_id, part_computer_id, part_name, part_type, part_description
- Customers Entity : Attributes of Customers are customer_id, customer_name, customer_mobile, customer_email, customer_username, customer_password, customer_address
- Services Entity : Attributes of Services are service_id, service_computer_id, service_charge, service_type, service_description
- Repairs Entity : Attributes of Repairs are repair_id, repair_customer_id, repair_computer_id, repai_bill, repair_type, repair_description
Description of Computer Sales and Service Management System Database :
- The details of Computer is store into the Computer tables respective with all tables
- Each entity (Repairs, Parts, Services, Sales, Computer) contains primary key and unique keys.
- The entity Parts, Services has binded with Computer, Sales entities with foreign key
- There is one-to-one and one-to-many relationships available between Services, Customers, Repairs, Computer
- All the entities Computer, Services, Parts, Repairs are normalized and reduce duplicacy of records
- We have implemented indexing on each tables of Computer Sales and Service Management System tables for fast query execution.