Re: Sum of columns

[Marc Mamin <M.Mamin@xxxxxxxxxxxx>]

hi,

 

in addition to the others comments, you can also remove  " ELSE 0 " from your query.

It will result in <NULL> values that are discarded by SUM.

 

regards,

 

Marc Mamin

 

From: pgsql-general-owner@xxxxxxxxxxxxxx [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of janek12@xxxxxx
Sent: Montag, 9. September 2013 03:13
To: pgsql-general@xxxxxxxxxxxxxx
Subject: [GENERAL] Sum of columns

 

Hi, 

 

this is my query:

SELECT user,

        sum(CASE WHEN lev >= 50 AND lev < 70 THEN 1 ELSE 0 END) as a,
        sum(CASE WHEN lev >= 70 AND lev < 80 THEN 1 ELSE 0 END) as b,
        sum(CASE WHEN lev >= 80 AND lev <= 90 THEN 1 ELSE 0 END) as c,

        sum(CASE WHEN lev > 90 THEN 1 ELSE 0 END) as d,
        (SELECT a + b + a + d) AS matches
        FROM t_temp_fts 
        GROUP BY user'

 

I like to add up the 4 columns a,b,c and d of every user, but it doesn't work like this.

Does anyone know a solution

 

Janek Sendrowski