Home/ Questions/Q 6070755
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-23T09:58:10+00:00

Suppose I have a table, Foo, that looks like this: ID | Name |

  • 0

Suppose I have a table, Foo, that looks like this:

ID  | Name  | Gender  | Team
1   | Bob   | Male    | A
2   | Amy   | Female  | A
3   | Cat   | Female  | B
4   | Dave  | Male    | B
5   | Evan  | Male    | B

If I wanted to get a list of the number of males and females per team on the same row, how would I do that?

I know I could do SELECT COUNT(Name) as "#", Team, Gender FROM foo GROUP BY Team, Gender, and that’s fine for most purpose.

But that would give me 2 rows per team, like below, and that can be a pain. 

#  Team Gender
1 | A | Male
1 | A | Female
1 | B | Female
2 | B | Male

How could I structure the query such that they appear on the same row?

ie,

Team | Males | Females
A    |   1   | 1
B    |   2   | 1
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The pattern I was looking for was a Self-Join; the syntax and logic is, in my mind, more elegant then the CASE pattern.

    Specifically,

    SELECT Males.Team, COUNT(Males.id) as "Males", SUM(Males.Points) as "Male Points", 
       COUNT(Females.id) as "Females", SUM(Females.Points) as "Female Points" 
FROM scores as Males 
LEFT JOIN scores as Females ON Males.Team=Females.Team AND Females.Gender="Female" 
WHERE Males.Gender="Male" 
GROUP BY Team

    Instead of case statements, the groupings I want in different columns get split into their own copies of the same table. You then join the table of Male players with a Table of Female players on the Team, and then group by the Team.

    • 0