Question

I have a small table, one row, three columns. I need it to be one column three rows.

Thanks,
Buzkie

Answer 1

For such a small table, why not use a UNION?

SELECT new_column_name
    FROM (
    SELECT col1 AS new_column_name
    FROM   table
    UNION
    SELECT col2
    FROM   table
    UNION
    SELECT col3
    FROM   table
) AS new_table

For larger tables, you could use the approach described in MarkW’s post. The DB2 function COALESCE() gives the same functionality as ISNULL() in those SQL Server examples.