/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

19 votes371 views3 answers
How to change column type psql
SQL
3 votes349 views1 answer
Mysql load sql from file
SQL
0 vote393 views1 answer
Sqlalchemy _in array sqlite
SQL
1 vote349 views1 answer
How to update date add hours in postgresql
SQL
0 vote339 views1 answer
Sql create table with references not primary key
SQL
0 vote353 views3 answers
Sql all columns
SQL
0 vote362 views1 answer
How to select a row in sql
SQL
2 votes305 views4 answers
Mysql change database character set to utf8mb4
SQL
0 vote328 views1 answer
How to get inserted id in sql server
SQL
0 vote563 views1 answer
Dublicate row sql
SQL