Accessing column alias in postgresql

Question

Having a little bit of trouble understanding how a query alias works in postgresql. I have the following:

SELECT DISTINCT robber.robberid,
                ni         


        

Answer 1

In general, you can't refer to an aggregate column's alias later in the query, and you have to repeat the aggregate

If you really want to use its name, you could wrap your query as a subquery

SELECT * 
FROM
(
    SELECT DISTINCT robber.robberid, nickname, count(accomplices.robberid)  
    AS count1 FROM robber                   
    INNER JOIN accomplices  
    ON accomplices.robberid = robber.robberid  
    GROUP BY robber.robberid, robber.nickname  
) v
ORDER BY count1 desc