Re: [GENERAL] How tö select a column?

["David G. Johnston" <david.g.johnston@xxxxxxxxx>]

On Sat, Feb 18, 2017 at 9:33 AM, Egon Frerich <egon@xxxxxxxxxx> wrote:

I have a table with two columns with type money. If column 'a' has an
amount > 0 then this amount is wanted else the amount from column 'b'.

​https://www.postgresql.org/docs/9.6/static/functions-conditional.html

SELECT CASE WHEN a > 0 THEN a ELSE b END AS a_or_b FROM tbl​;

David J.