AdventureWorks Database: Repeat a zero four times in front of a production line

SQL Query - AdventureWorks: Exercise-68 with Solution

68. From the following table write a query in SQL to repeat a 0 character four times in front of a production line for production line 'T'.

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' column and concatenating a string of four '0' characters with the 'ProductLine' column,
-- and aliasing the result as "Line Code"
SELECT Name, concat(REPeat('0', 4) , ProductLine) AS "Line Code"  

-- From the Production schema's Product table
FROM Production.Product  

-- Filtering the results to include only rows where the 'ProductLine' column is 'T'
WHERE ProductLine = 'T'  

-- Ordering the result set by the 'Name' column
ORDER BY Name;

Explanation:

• The SQL query retrieves data from the Product table within the Production schema.
• It selects the 'Name' column.
• The REPEAT() function repeats the character '0' four times to create a string of four '0' characters.
• The concat() function concatenates the string of four '0' characters with the value of the 'ProductLine' column.
• The result of the concatenation is aliased as "Line Code".
• The WHERE clause filters the results to include only rows where the value of the 'ProductLine' column is 'T'.
• The result set is ordered alphabetically by the 'Name' column.

Sample Output:

name                         |Line Code|
-----------------------------+---------+
HL Touring Frame - Blue, 46  |0000T    |
HL Touring Frame - Blue, 50  |0000T    |
HL Touring Frame - Blue, 54  |0000T    |
HL Touring Frame - Blue, 60  |0000T    |
HL Touring Frame - Yellow, 46|0000T    |
HL Touring Frame - Yellow, 50|0000T    |
HL Touring Frame - Yellow, 54|0000T    |
HL Touring Frame - Yellow, 60|0000T    |
HL Touring Handlebars        |0000T    |
HL Touring Seat/Saddle       |0000T    |
LL Touring Frame - Blue, 44  |0000T    |
LL Touring Frame - Blue, 50  |0000T    |
LL Touring Frame - Blue, 54  |0000T    |
LL Touring Frame - Blue, 58  |0000T    |
LL Touring Frame - Blue, 62  |0000T    |
...

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