Question

I got a table containing 3 columns:

NameColumn  CategoryColumn  QuantityColumn
Name1       Category1   5
Name2       Category1   8
Name3       Category1   10
Name4       Category2   3
Name5       Category2   15
Name6       Category2   7

I need to write a query to convert the above data into the following result set:

NameColumn  CategoryColumn  QuantityColumn
Category1   NULL        NULL
Name1       NULL        5
Name2       NULL        8
Name3       NULL        10
Category2   NULL        NULL
Name4       NULL        3
Name5       NULL        15
Name6       NULL        7

Is there anyway to do this without using cursors?
Thanks.

Answer 1

SELECT NameColumn, CategoryColumn, QuantityColumn
FROM
(
    SELECT CategoryColumn AS NameColumn, NULL AS CategoryColumn, NULL AS QuantityColumn,
        CategoryColumn AS _cat, 1 AS _iscat
    FROM myTable
    GROUP BY CategoryColumn
    UNION ALL
    SELECT NameColumn, NULL AS CategoryColumn, QuantityColumn, 
        CategoryColumn AS _cat, 0 AS _iscat
    FROM myTable
) x
ORDER BY _cat, _iscat DESC

SQL Fiddle example