/SQL/SQL Server dynamic pivot unknown number of columns

SQL Server dynamic pivot unknown number of columns

-   DECLARE @v_query  VARCHAR(8000) -- main query
    DECLARE @v_columns VARCHAR(8000) -- columns

    SET @v_columns =''

    -- Get string columns
    SELECT @v_columns += '[' + CONVERT(VARCHAR, Item) +'],' FROM (SELECT DISTINCT Item FROM #temp2) AS temp

    -- Delete the last comma
    SET @v_columns = LEFT(@v_columns,LEN(@v_columns)-1)


    -- Main query

    SET @v_query = 'SELECT Name, ' + @v_columns +' FROM
                    (
                        SELECT Name, Item FROM #temp2
                    ) T             
                    PIVOT
                    (
                        Count(Item)
                        FOR Item IN ('+ @v_columns +')
                    ) PVT'
    EXEC (@v_query)

Source: stackoverflow.com

Similar codes

15 votes151 views5 answers
Select all tables sql
SQL
1 vote133 views1 answer
How to test for sql injection
SQL
3 votes143 views1 answer
Sql cast to integer
SQL
1 vote148 views1 answer
Find difference in dates sql
SQL
0 vote137 views1 answer
How to find all children of a record with only parent ID in sql
SQL
0 vote127 views1 answer
Set column width in sqlplus
SQL
0 vote144 views1 answer
New rails app with mysql
SQL
1 vote146 views1 answer
Difference between where and having clause
SQL
5 votes135 views3 answers
Mysql check if null or empty string
SQL
0 vote130 views1 answer
List all permissions on a table in postgres
SQL