[sql] SQL Server : Columns to Rows

Just to help new readers, I've created an example to better understand @bluefeet's answer about UNPIVOT.

 SELECT id
        ,entityId
        ,indicatorname
        ,indicatorvalue
  FROM (VALUES
        (1, 1, 'Value of Indicator 1 for entity 1', 'Value of Indicator 2 for entity 1', 'Value of Indicator 3 for entity 1'),
        (2, 1, 'Value of Indicator 1 for entity 2', 'Value of Indicator 2 for entity 2', 'Value of Indicator 3 for entity 2'),
        (3, 1, 'Value of Indicator 1 for entity 3', 'Value of Indicator 2 for entity 3', 'Value of Indicator 3 for entity 3'),
        (4, 2, 'Value of Indicator 1 for entity 4', 'Value of Indicator 2 for entity 4', 'Value of Indicator 3 for entity 4')
       ) AS Category(ID, EntityId, Indicator1, Indicator2, Indicator3)
UNPIVOT
(
    indicatorvalue
    FOR indicatorname IN (Indicator1, Indicator2, Indicator3)
) UNPIV;

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