feat(leetcode/easy/1571-warehouse-manager.sql)

coding-challange/leetcode/easy/1571-warehouse-manager/1571-warehouse-manager.sql

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+# 1571-warehouse-manager
+# leetcode/easy/1571. Warehouse Manager
+# Difficulty: easy
+# URL: https://leetcode.com/problems/warehouse-manager/
+#
+# Input:
+# Warehouse table:
+# +------------+--------------+-------------+
+# | name       | product_id   | units       |
+# +------------+--------------+-------------+
+# | LCHouse1   | 1            | 1           |
+# | LCHouse1   | 2            | 10          |
+# | LCHouse1   | 3            | 5           |
+# | LCHouse2   | 1            | 2           |
+# | LCHouse2   | 2            | 2           |
+# | LCHouse3   | 4            | 1           |
+# +------------+--------------+-------------+
+# Products table:
+# +------------+--------------+------------+----------+-----------+
+# | product_id | product_name | Width      | Length   | Height    |
+# +------------+--------------+------------+----------+-----------+
+# | 1          | LC-TV        | 5          | 50       | 40        |
+# | 2          | LC-KeyChain  | 5          | 5        | 5         |
+# | 3          | LC-Phone     | 2          | 10       | 10        |
+# | 4          | LC-T-Shirt   | 4          | 10       | 20        |
+# +------------+--------------+------------+----------+-----------+
+# Output:
+# +----------------+------------+
+# | warehouse_name | volume     |
+# +----------------+------------+
+# | LCHouse1       | 12250      |
+# | LCHouse2       | 20250      |
+# | LCHouse3       | 800        |
+# +----------------+------------+
+# Explanation:
+# Volume of product_id = 1 (LC-TV), 5x50x40 = 10000
+# Volume of product_id = 2 (LC-KeyChain), 5x5x5 = 125
+# Volume of product_id = 3 (LC-Phone), 2x10x10 = 200
+# Volume of product_id = 4 (LC-T-Shirt), 4x10x20 = 800
+# LCHouse1: 1 unit of LC-TV + 10 units of LC-KeyChain + 5 units of LC-Phone.
+#           Total volume: 1*10000 + 10*125  + 5*200 = 12250 cubic feet
+# LCHouse2: 2 units of LC-TV + 2 units of LC-KeyChain.
+#           Total volume: 2*10000 + 2*125 = 20250 cubic feet
+# LCHouse3: 1 unit of LC-T-Shirt.
+#           Total volume: 1*800 = 800 cubic feet.
+
+# SELECT warehouse_name, SUM(volume) AS volume
+# FROM
+
+
+SELECT name AS warehouse_name, SUM(units * volume) AS volume
+FROM Warehouse
+         LEFT JOIN (SELECT product_id, (Width * Length * Height) AS volume
+                     FROM Products) AS P ON Warehouse.product_id = P.product_id
+GROUP BY name;