AdventureWorks Database: Display the list price as a comment based on the price range

SQL Query - AdventureWorks: Exercise-127 with Solution

127. From the following table write a query in SQL to display the list price as a text comment based on the price range for a product. Return ProductNumber, Name, and listprice. Sort the result set on ProductNumber in ascending order.

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 specific columns from the Product table and adding a calculated column for price range
SELECT   
    -- Selecting the ProductNumber column
    ProductNumber, 
    -- Selecting the Name column
    Name, 
    -- Selecting the listprice column
    listprice, 
    -- Applying a CASE statement to categorize products into price ranges
    CASE 
        -- Condition: ListPrice is 0
        WHEN ListPrice =  0 THEN 'Mfg item - not for resale'  
        -- Condition: ListPrice is less than 50
        WHEN ListPrice < 50 THEN 'Under $50'  
        -- Condition: ListPrice is between 50 and 249.99
        WHEN ListPrice >= 50 and ListPrice < 250 THEN 'Under $250'  
        -- Condition: ListPrice is between 250 and 999.99
        WHEN ListPrice >= 250 and ListPrice < 1000 THEN 'Under $1000'  
        -- Default condition: ListPrice is 1000 or more
        ELSE 'Over $1000'  
    END "Price Range" 
-- Selecting data from the Product table
FROM Production.Product  
-- Ordering the result set by ProductNumber
ORDER BY ProductNumber ;

Explanation:

• This SQL code selects specific columns from the Product table and adds a calculated column for price range.
• The CASE statement categorizes products into different price ranges based on their ListPrice.
• If ListPrice is 0, the product is labeled as 'Mfg item - not for resale'.
• If ListPrice is less than 50, the product is labeled as 'Under $50'.
• If ListPrice is between 50 and 249.99, the product is labeled as 'Under $250'.
• If ListPrice is between 250 and 999.99, the product is labeled as 'Under $1000'.
• If ListPrice is 1000 or more, the product is labeled as 'Over $1000'.
• The result set is ordered by ProductNumber.

Sample Output:

productnumber|name                            |listprice|Price Range              |
-------------+--------------------------------+---------+-------------------------+
AR-5381      |Adjustable Race                 |        0|Mfg item - not for resale|
BA-8327      |Bearing Ball                    |        0|Mfg item - not for resale|
BB-7421      |LL Bottom Bracket               |    53.99|Under $250               |
BB-8107      |ML Bottom Bracket               |   101.24|Under $250               |
BB-9108      |HL Bottom Bracket               |   121.49|Under $250               |
BC-M005      |Mountain Bottle Cage            |     9.99|Under $50                |
BC-R205      |Road Bottle Cage                |     8.99|Under $50                |
BE-2349      |BB Ball Bearing                 |        0|Mfg item - not for resale|
BE-2908      |Headset Ball Bearings           |        0|Mfg item - not for resale|
BK-M18B-40   |Mountain-500 Black, 40          |   539.99|Under $1000              |
BK-M18B-42   |Mountain-500 Black, 42          |   539.99|Under $1000              |
BK-M18B-44   |Mountain-500 Black, 44          |   539.99|Under $1000              |
BK-M18B-48   |Mountain-500 Black, 48          |   539.99|Under $1000              |
BK-M18B-52   |Mountain-500 Black, 52          |   539.99|Under $1000              |
...

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