import sqlite3
conn = sqlite3.connect('backend/sale.db')
cursor = conn.cursor()
cursor.execute("SELECT id, name FROM categories")
print("Categories in database:")
for row in cursor.fetchall():
    print(f"  ID: {row[0]}, Name: {row[1]}")

cursor.execute("SELECT product_id, category_id FROM product_categories")
print("\nProduct-Category relations:")
for row in cursor.fetchall():
    print(f"  Product ID: {row[0]}, Category ID: {row[1]}")