SQL to transpose data

Question

I have a table named Forecast as below:

Product_BK has about 80,000 records, while the Month has 12. The States remain static at 5.

How can I write a qu

Answer 1

You can use SQL Server's built-in UNPIVOT function:

SELECT PRODUCT_BK, Month, State, Forecast
FROM
(SELECT * FROM Forecast_Table) t
UNPIVOT
(Forecast FOR State IN (SA_NT, QLD, VIC_TAS, WA, NSW_ACT)) AS fcst