Question

I want to get an answer which a table has two column and many rows. For each row, I want two column shown in some order, for example:

initial table:

+-----------+---------+
| nameA     | nameB   |
+-----------+---------+
| Ca        | Us      | 
| Db        | Ac      |  
+-----------+---------+

The target table is:

+-----------+---------+
| nameA     | nameB   |
+-----------+---------+
| Ca        | Us      | 
| Ac        | Db      |  
+-----------+---------+

How to fix it? Thanks!

Answer 1

You could try

SELECT
    (CASE WHEN nameA <= nameB THEN nameA
    ELSE nameB END) AS field1,
    (CASE WHEN nameA < nameB THEN nameB
    ELSE nameA END) AS field2
FROM your_table