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26 lines
1.3 KiB
Transact-SQL
26 lines
1.3 KiB
Transact-SQL
/*
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Find the top 10 buyers who purchased a specific item ordered by how much they spent
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Using graph tables
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Using regular tables
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*/
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-- using graph tables
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SELECT top (10) sum(OrderLines_StockItemsToCustomers.UnitPrice * OrderLines_StockItemsToCustomers.Quantity) AS TotalSpendingOnItem, CustomerName, Customers.CustomerID
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FROM Graph.Customers, Graph.OrderLines_StockItemsToCustomers, Graph.StockItems
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WHERE MATCH (StockItems - (OrderLines_StockItemsToCustomers) -> Customers)
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and StockItems.StockItemName = 'Chocolate frogs 250g'
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GROUP BY Customers.CustomerID, Customers.CustomerName
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ORDER BY TotalSpendingOnItem DESC, Customers.CustomerName ;
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go
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-- using regular tables
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SELECT top (10) sum(q2.UnitPrice * q2.Quantity) AS TotalSpendingOnItem, q4.CustomerName, q4.CustomerID
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FROM (SELECT StockItemID, StockItemName FROM Warehouse.StockItems) AS q1
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join (SELECT StockItemID, OrderID, Quantity, UnitPrice FROM Sales.OrderLines) AS q2 ON q1.StockItemID = q2.StockItemID
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join (SELECT OrderID, CustomerID FROM Sales.Orders) AS q3 ON q2.OrderID = q3.OrderID
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join (SELECT CustomerID, CustomerName FROM Sales.Customers) AS q4 ON q3.CustomerID = q4.CustomerID
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WHERE q1.StockItemName = 'Chocolate frogs 250g'
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GROUP BY q4.CustomerID, q4.CustomerName
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ORDER BY TotalSpendingOnItem DESC, q4.CustomerName ;
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go
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