SQL Convert column to row

Question

My table has the following columns:

A  |  B  |  C  |  D  |  E  |  F  

I want to displays this as follow:

MyColumn  |  MyCol         


        

Answer 1

This won't scale to a billion columns but...

Select A as MyColumn, B as MyColumn2 from Table
UNION
Select C as MyColumn, D as MyColumn2 from Table
UNION
Select E as MyColumn, F as MyColumn2 from Table

This query will remove the duplicates though. So say there's one record in the table

Hello | World | Hello | World | Hello | World

My select will only return

Hello | World

Sambo's will return all three...