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Query with Count and group by

Author

Topic

DaveBF
Yak Posting Veteran

89 Posts

Posted - 2013-11-19 : 11:41:49

I have a table of people:
Name, City, Sex
I want a table where each line is the city, and the number of Males and Females.

For example, this is what I tried, and I know it's wrong:


Select City, count(name) where Sex = 'M' as NumberM,
count(name) where Sex = 'F' as NumberF
Group by City

how do I do this?
Thanks.

TG
Master Smack Fu Yak Hacker

6065 Posts

Posted - 2013-11-19 : 12:03:33

Here's one way:


Select City
       ,sum(case when sex = 'm' then 1 else 0 end) as NumberM
       ,sum(case when sex = 'f' then 1 else 0 end) as NumberF
Group by City

Be One with the Optimizer
TG

DaveBF
Yak Posting Veteran

89 Posts

Posted - 2013-11-19 : 12:09:07

quote:

Originally posted by TG

Here's one way:


Select City
       ,sum(case when sex = 'm' then 1 else 0 end) as NumberM
       ,sum(case when sex = 'f' then 1 else 0 end) as NumberF
Group by City

Be One with the Optimizer
TG

Got it. Thanks!

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-11-20 : 02:02:23

Another way is to use pivot


select City,[m]  AS NumberM,[f] AS NumberF
from (select City,sex,1 as cnt
      from table
      )m
pivot (sum(cnt) for sex in ([m],[f]))p

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