How can proper normalization of database tables improve the handling of different price categories for products in a PHP application?

Proper normalization of database tables can improve the handling of different price categories for products in a PHP application by creating separate tables for products and price categories, and establishing relationships between them using foreign keys. This allows for more efficient querying and updating of prices based on categories, as well as easier maintenance and scalability of the application.

// Example of creating separate tables for products and price categories

// Table structure for products
CREATE TABLE products (
    id INT PRIMARY KEY,
    name VARCHAR(255),
    category_id INT,
    description TEXT
);

// Table structure for price categories
CREATE TABLE price_categories (
    id INT PRIMARY KEY,
    name VARCHAR(50)
);

// Establishing a foreign key relationship between products and price_categories
ALTER TABLE products
ADD CONSTRAINT fk_category_id
FOREIGN KEY (category_id)
REFERENCES price_categories(id);