Turning columns into rows

In the previous exercise, you turned the names of the products you had in the rows into columns, and then you summarized the units of the products for every year.

Suppose you stored the result from the previous exercise in a new table called pivot_sales, and now you want to turn the columns notebooks, pencils, and crayons into row values.

The expected result will be:

| year_of_sale | units | product_name |
|--------------|-------|--------------|
| 2018         | 150   | notebooks    |
| 2018         | 150   | pencils      |
| 2018         | 80    | crayons      |
| 2019         | 230   | notebooks    |
| 2019         | 130   | pencils      |
| 2019         | 170   | crayons      |

Cet exercice fait partie du cours

Cleaning Data in SQL Server Databases

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Instructions

Use the appropriate operator to convert columns into rows.
Write the name of the resulting column that will contain the turned columns.
Write the names of the columns you want to turn into rows.
Give to the UNPIVOT operator the alias unpivot_sales.

Exercice interactif pratique

Essayez cet exercice en complétant cet exemple de code.

SELECT * FROM pivot_sales
-- Use the operator to convert columns into rows
___
	-- The resulting column that will contain the turned columns into rows
	(units FOR ___ IN (___, ___, ___))
-- Give the alias name
AS ___

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