Re: devide and summarize sql result (all)

[salah jubeh <s_jubeh@xxxxxxxxx>]

Hello,

Use a view

Regards

---

From: Janek Sendrowski <janek12@xxxxxx>
To: pgsql-general@xxxxxxxxxxxxxx
Sent: Friday, August 16, 2013 11:55 AM
Subject: Re: devide and summarize sql result (all)

Thanks for your Answers,

 

my problem is, that there is no column with the name 'percentage'.

It's just a result of my query. So how can I use it anyway?

Should I just store the result in a record variable and do another query?

 

Janek

 

Gesendet: Freitag, 16. August 2013 um 00:24 Uhr
Von: bricklen <bricklen@xxxxxxxxx>
An: "Janek Sendrowski" <janek12@xxxxxx>
Cc: "pgsql-general@xxxxxxxxxxxxxx" <pgsql-general@xxxxxxxxxxxxxx>
Betreff: Re: devide and summarize sql result (all)

On Thu, Aug 15, 2013 at 1:51 PM, Janek Sendrowski <janek12@xxxxxx> wrote:

Hi,
 
My sql query results sth. like this:
 
user percentage
franz 78%
smith 98%
franz 81%
jason 79%

smith 89%

smith 85%

smith 99%

 

Now I'd like to summarize the percentages oder every user like this.

smith

2 matches 95-100%

2 matches 85-95%

0 mathes 75-85%

 

franz

0 mathes 95-100%

...

A CASE statement should work, if you are willing to hard-code the list of expressions.

SELECT  username,
        sum(case when avg between 76 and 85 then 1 else 0 end) as "76 to 85",
        sum(case when avg between 86 and 95 then 1 else 0 end) as "86 to 95",
        sum(case when avg > 95 then 1 else 0 end) as ">95"
FROM yourtable
GROUP BY username