Re: Sum of columns

[Rob Sargentg <robjsargent@xxxxxxxxx>]

On 09/08/2013 07:12 PM, janek12@xxxxxx wrote:

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

How far does this get you?
insert into t_temp_fts values('rob', 51), ('rob', 71), ('rob', 81), ('rob', 91);
insert into t_temp_fts values('jon', 51), ('jon', 71), ('jon', 81), ('jon', 91);
SELECT distinct usern,
        (select count(*) from t_temp_fts i where o.usern = i.usern and  lev >= 50 AND lev < 70) as a,
        (select count(*) from t_temp_fts i where o.usern = i.usern and  lev >= 70 AND lev < 80)as b ,
        (select count(*) from t_temp_fts i where o.usern = i.usern and  lev >= 80 AND lev < 90)as c ,
        (select count(*) from t_temp_fts i where o.usern = i.usern and  lev > 90)              as d
from t_temp_fts o
;
  usern | a | b | c | d
-------+---+---+---+---
 jon   | 1 | 1 | 1 | 1
 rob   | 1 | 1 | 1 | 1
(2 rows)