Pivot with unknown number of column names

Sven Snusberg answered on August 27, 2021 Popularity 3/10 Helpfulness 2/10

answer Pivot with unknown number of column names

Pivot with unknown number of column names

Comment

DECLARE @cols AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX)

select @cols = STUFF((SELECT ',' + QUOTENAME(ColumnName) 
                    from yourtable
                    group by ColumnName, id
                    order by id
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

set @query = N'SELECT ' + @cols + N' from 
             (
                select value, ColumnName
                from yourtable
            ) x
            pivot 
            (
                max(value)
                for ColumnName in (' + @cols + N')
            ) p '

exec sp_executesql @query;

Popularity 3/10 Helpfulness 2/10 Language whatever

Source: stackoverflow.com

Tags: names pivot whatever

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