11 lines
438 B
MySQL
11 lines
438 B
MySQL
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-- had to fix column type for order_items/orderid from txt to int, else, was damned too slow
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with sales as (select * from orders_items as oi
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left join products as p on (oi.sku = p.sku)
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where oi.unit_price < p.wholesale_cost)
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select c.*, count(o.customerid) c from sales as s
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left join orders as o on (o.orderid = s.orderid)
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left join customers as c on (c.customerid = o.customerid)
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group by o.customerid
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order by c desc
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-- pick first one
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