Question

Is it possible to order by a new column inside row_number?
I would like to do something like this:

select text1 + text2 as NEW_TEXT, row_number over (order by NEW_TEXT) from table

but such sorting doesn’t work (I get random results).

Answer 1

You have to repeat the expression text1 + text2

select text1 + text2 as NEW_TEXT, 
row_number() over (order by text1 + text2)
from table

Or do it in steps (foo could be a CTE here)

SELECT
    NEW_TEXT,
    row_number() over (order by NEW_TEXT)
FROM
    (
    select text1 + text2 as NEW_TEXT from table
    ) foo