SQL Select with Distinct

Question

使用此数据

Team Name Won
X    Andy  1
X    Cara  1
X    Cara  1
X    Eric  0
X    Eric  0
X    Eric  0
X    Eric  0
Y    Bill  0
Y    Dave  0
Y    Dave  1
Y    Dave  1

我希望每支球队的球员数量和获胜者数量

Team Players Winners
X       3       2
Y       2       1

是否在两个查询中：

select team, count(distinct Name) as Players from test group by team
select team, count(distinct Name) as Winners from test where Won=1 group by team

但我无法解决其中的语法问题。 TIA的帮助。约翰

Answer 1

您可以使用case进行条件聚合：

select team,
    count(distinct name) as Players,
    count(distinct case when won = 1 then name end) as winners
from test
group by team

Answer 2

试试这个：

select team, count(distinct Name) as Players, sum(won) Winners 
from (select distinct * from test) tst 
group by team

您可以在此处进行测试：http://rextester.com/QATLK24197

Answer 3

你可以按小组

来做

选择球队，计数（名称）为球员，总和（获胜）获胜者来自（ 选择团队，名称，总和（明显赢得）从团队，名称的测试组中获胜 ）按团队分组