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Aggregating columns

You need to clean and analyze your stock data to understand high-value inventory patterns. Raw inventory data often includes irrelevant items and needs organization by category. Clean the data by filtering for expensive items (over $5), then calculate accurate totals, and organize by category. This cleaned and summarized view helps identify which departments have the most investment in premium products.

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Este exercicio faz parte do curso

Cleaning Data in Java

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Instruções do exercicio

  • Find expensive items (Unit_Price > $5.00).
  • Calculate the total Stock_Quantity for each category.
  • Group results by Category.

exercicio interativo prático

Tente este exercicio completando este código de exemplo.

public class GroceryDataAggregation {
    public static void main(String[] args) {
        Table inventory = Table.read().csv("grocery_inventory.csv");

        Table quantityByCategory = inventory
                // Find expensive items (price > $5.00)
                .where(inventory.doubleColumn("Unit_Price").____(5.0))
                // Calculate total stock for each category
                .____("Stock_Quantity", ____)
                // Group results by product category
                .____("Category");

        System.out.println("Total quantity by category:");
        System.out.println(quantityByCategory.first(5));
    }
}
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