Entity Structures in SQL Format
Here’s how the entities mentioned above can be structured in SQL format
-- User Table
CREATE TABLE User (
UserID INT PRIMARY KEY,
Username VARCHAR(255),
Email VARCHAR(255),
PasswordHash VARCHAR(255),
ProfilePicture VARCHAR(255),
UserType VARCHAR(50)
);
-- Car Listing Table
CREATE TABLE CarListing (
CarID INT PRIMARY KEY,
Make VARCHAR(50),
Model VARCHAR(50),
Year INT,
Mileage INT,
Price DECIMAL(10, 2),
Features TEXT,
SellerID INT,
Location VARCHAR(255),
FOREIGN KEY (SellerID) REFERENCES User(UserID)
);
-- Transaction Table
CREATE TABLE Transaction (
TransactionID INT PRIMARY KEY,
BuyerID INT,
SellerID INT,
CarID INT,
OfferPrice DECIMAL(10, 2),
TransactionStatus VARCHAR(50),
FOREIGN KEY (BuyerID) REFERENCES User(UserID),
FOREIGN KEY (SellerID) REFERENCES User(UserID),
FOREIGN KEY (CarID) REFERENCES CarListing(CarID)
);
-- Review Table
CREATE TABLE Review (
ReviewID INT PRIMARY KEY,
ReviewedUserID INT,
ReviewerID INT,
Rating INT CHECK (Rating BETWEEN 1 AND 5),
Comment TEXT,
FOREIGN KEY (ReviewedUserID) REFERENCES User(UserID),
FOREIGN KEY (ReviewerID) REFERENCES User(UserID)
);
Database Model for Used Car Applications
The database model for used car applications revolves around efficiently managing car listings, user interactions, transactions, reviews, and their relationships to provide a seamless buying and selling experience.
How to Design a Database For Used Cars Selling Application?
Designing a database for a used car application involves considerations such as data structure, scalability, performance optimization, and user experience. A robust database serves as the backbone for managing car listings, user accounts, transactions, reviews, and other essential functionalities, ensuring a smooth and hassle-free buying and selling process.
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