Чистовик статьи + материалы

dwh-modeling/data/customers.csv

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+customer_id,email,phone,city
+101,a@ex.com,700,Москва
+101,b@ex.com,700,Москва
+102,c@ex.com,701,СПб

dwh-modeling/data/order_items.csv

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+order_item_id,order_id,product_id,qty,price_at_sale
+1,5001,9001,2,100.00
+2,5001,9002,1,50.00
+3,5002,9001,1,100.00

dwh-modeling/data/orders.csv

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+order_id,order_date,customer_id
+5001,2024-01-10,101
+5002,2024-02-05,102

dwh-modeling/data/prices.csv

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+product_id,valid_from,valid_to,price
+9001,2023-12-01,2024-01-31,100.00
+9001,2024-02-01,2999-12-31,110.00
+9002,2023-01-01,2999-12-31,50.00

dwh-modeling/data/products.csv

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+product_id,name
+9001,Phone
+9002,Case