AdventureWorks Database: Return the name of the product that is the least expensive

SQL Query - AdventureWorks: Exercise-102 with Solution

102. From the following table write a query in SQL to return the name of the product that is the least expensive in a given product category. Return name, list price and the first value i.e. LeastExpensive of the product.

productid|name                            |productnumber|makeflag|finishedgoodsflag|color       |safetystocklevel|reorderpoint|standardcost|listprice|size|sizeunitmeasurecode|weightunitmeasurecode|weight |daystomanufacture|productline|class|style|productsubcategoryid|productmodelid|sellstartdate          |sellenddate            |discontinueddate|rowguid                             |modifieddate           |
---------+--------------------------------+-------------+--------+-----------------+------------+----------------+------------+------------+---------+----+-------------------+---------------------+-------+-----------------+-----------+-----+-----+--------------------+--------------+-----------------------+-----------------------+----------------+------------------------------------+-----------------------+
        1|Adjustable Race                 |AR-5381      |false   |false            |            |            1000|         750|           0|        0|    |                   |                     |       |                0|           |     |     |                    |              |2008-04-30 00:00:00.000|                       |                |694215b7-08f7-4c0d-acb1-d734ba44c0c8|2014-02-08 10:01:36.827|
        2|Bearing Ball                    |BA-8327      |false   |false            |            |            1000|         750|           0|        0|    |                   |                     |       |                0|           |     |     |                    |              |2008-04-30 00:00:00.000|                       |                |58ae3c20-4f3a-4749-a7d4-d568806cc537|2014-02-08 10:01:36.827|
        3|BB Ball Bearing                 |BE-2349      |true    |false            |            |             800|         600|           0|        0|    |                   |                     |       |                1|           |     |     |                    |              |2008-04-30 00:00:00.000|                       |                |9c21aed2-5bfa-4f18-bcb8-f11638dc2e4e|2014-02-08 10:01:36.827|
        4|Headset Ball Bearings           |BE-2908      |false   |false            |            |             800|         600|           0|        0|    |                   |                     |       |                0|           |     |     |                    |              |2008-04-30 00:00:00.000|                       |                |ecfed6cb-51ff-49b5-b06c-7d8ac834db8b|2014-02-08 10:01:36.827|
      316|Blade                           |BL-2036      |true    |false            |            |             800|         600|           0|        0|    |                   |                     |       |                1|           |     |     |                    |              |2008-04-30 00:00:00.000|                       |                |e73e9750-603b-4131-89f5-3dd15ed5ff80|2014-02-08 10:01:36.827|
      317|LL Crankarm                     |CA-5965      |false   |false            |Black       |             500|         375|           0|        0|    |                   |                     |       |                0|           |L    |     |                    |              |2008-04-30 00:00:00.000|                       |                |3c9d10b7-a6b2-4774-9963-c19dcee72fea|2014-02-08 10:01:36.827|
      318|ML Crankarm                     |CA-6738      |false   |false            |Black       |             500|         375|           0|        0|    |                   |                     |       |                0|           |M    |     |                    |              |2008-04-30 00:00:00.000|                       |                |eabb9a92-fa07-4eab-8955-f0517b4a4ca7|2014-02-08 10:01:36.827|
	  -- more --

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Sample Solution:

-- Selecting the Name and ListPrice columns, along with the least expensive product within the ProductSubcategoryID = 37
SELECT Name, ListPrice,
       FIRST_VALUE(Name) OVER (ORDER BY ListPrice ASC) AS LeastExpensive
-- From the Production.Product table
FROM Production.Product
-- Filtering the products based on the ProductSubcategoryID = 37
WHERE ProductSubcategoryID = 37;

Explanation:

• This SQL query retrieves the name and list price of products from the Production.Product table, along with the name of the least expensive product within the ProductSubcategoryID = 37.
• The SELECT clause specifies the columns to be retrieved, including the product name, list price, and the name of the least expensive product.
• The FROM clause indicates the source table from which the data will be retrieved.
• The WHERE clause filters the products based on the ProductSubcategoryID = 37, focusing on a specific category.
• The OVER clause is used with the FIRST_VALUE window function to calculate the least expensive product within the specified category. It orders the list of products by ListPrice in ascending order.

Sample Output:

name               |listprice|leastexpensive     |
-------------------+---------+-------------------+
Patch Kit/8 Patches|     2.29|Patch Kit/8 Patches|
Road Tire Tube     |     3.99|Patch Kit/8 Patches|
Touring Tire Tube  |     4.99|Patch Kit/8 Patches|
Mountain Tire Tube |     4.99|Patch Kit/8 Patches|
LL Road Tire       |    21.49|Patch Kit/8 Patches|
LL Mountain Tire   |    24.99|Patch Kit/8 Patches|
ML Road Tire       |    24.99|Patch Kit/8 Patches|
Touring Tire       |    28.99|Patch Kit/8 Patches|
ML Mountain Tire   |    29.99|Patch Kit/8 Patches|
HL Road Tire       |     32.6|Patch Kit/8 Patches|
HL Mountain Tire   |       35|Patch Kit/8 Patches|

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