Question

I am looking to join two columns as a single … Here is an idea ..

=======================================================
    id  | firstname  |        lastname
=======================================================
    1   | Peter      | Das
-------------------------------------------------------
    2   | Das        | James
-------------------------------------------------------
    3   | vector     | Call
______________________________________________________________
    4   | cans       | Das

The sql query should look like this (pseudocode)

SELECT (lastname WHERE firstname='Das' AND firstname WHERE lastname='Das' 
    ORDER BY ID DESC) AS name

And the resultset should look like this

    ======================
        name
    ======================
        cans
    ---------------------------------------
        James
    ---------------------------------------
        Peter

Now can anyone please tell me what is the exact query

Every idea hints suggestions are welcome

Answer 1

Looks like a job for a UNION query

SELECT id, firstName AS name
FROM table
WHERE lastName = 'Das'
UNION ALL
SELECT id, lastName AS name
FROM table
WHERE firstName = 'Das'
ORDER BY id DESC