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In the contemporary age where online food delivery systems have surged in popularity, the efficient management of food orders has become crucial. SQL, with its robust and versatile nature, can serve as a powerful tool for deriving structured and actionable insights from order data. In this post, we’ll explore how to create and manage a food delivery order system with SQL.
Designing the Database
The first step involves designing a database that stores information about customers, restaurants, food items, and orders. This would require creating several tables:
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CREATE TABLE Customers ( CustomerID int, FirstName varchar(255), LastName varchar(255), Email varchar(255), Address varchar(255), PRIMARY KEY (CustomerID) ); CREATE TABLE Restaurants ( RestaurantID int, Name varchar(255), Address varchar(255), PRIMARY KEY (RestaurantID) ); CREATE TABLE FoodItems ( FoodItemID int, Name varchar(255), Price decimal(5,2), RestaurantID int, PRIMARY KEY (FoodItemID), FOREIGN KEY (RestaurantID) REFERENCES Restaurants(RestaurantID) ); CREATE TABLE Orders ( OrderID int, CustomerID int, FoodItemID int, Quantity int, TimeOrdered datetime, PRIMARY KEY (OrderID), FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID), FOREIGN KEY (FoodItemID) REFERENCES FoodItems(FoodItemID) ); |
Adding a New Order
With the tables created, you can now insert data into them. For instance, to add a new order:
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INSERT INTO Orders (OrderID, CustomerID, FoodItemID, Quantity, TimeOrdered) VALUES (1, 101, 201, 2, GETDATE()); |
Fetching Order Details
To fetch specific order details, you can perform a SELECT statement like:
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SELECT Orders.OrderID, Customers.FirstName, Customers.LastName, FoodItems.Name, Orders.Quantity, Orders.TimeOrdered FROM Orders INNER JOIN Customers ON Orders.CustomerID = Customers.CustomerID INNER JOIN FoodItems ON Orders.FoodItemID = FoodItems.FoodItemID WHERE Orders.OrderID = 1; |
Updating an Order
Modifying an existing order’s quantity can also be quickly done. For example, to update the quantity of order 1, use the UPDATE statement:
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UPDATE Orders SET Quantity = 3 WHERE OrderID = 1; |
Conclusion
This post introduced a basic SQL structure for managing a food delivery order system. We’ve created tables to store necessary data, add a new order, fetch order details, and update an order. With these foundations, you can further tailor this SQL scheme to meet the specific requirements of your food delivery system. Happy querying!