哪一个应该用于Partition子句或With子句？

Question

以下是包含数据的锦标赛表格结构。

|-------|-----------|
|  Team |  Result   |
|-------|-----------|
|   A   |   Win     |
|-------|-----------|
|   A   |   Loss    |
|-------|-----------|
|   A   |   Draw    |
|-------|-----------|
|   B   |   Win     |
|-------|-----------|
|   B   |   Win     |
|-------|-----------|
|   C   |   Loss    |
|-------|-----------|
|   C   |   Loss    |
|-------|-----------|
|   A   |   Draw    |
|-------|-----------|
|   C   |   Win     |
|-------|-----------|

以下是必填结果

|-------|-----------|--------|--------|---------|               
|  Team |  Win      |   Loss |  Draw  |  Total  |   
|-------|-----------|--------|--------|---------|
|   A   |   1       |   1    |  2     |     4   |
|-------|-----------|--------|--------|---------|
|   B   |   2       |   0    |  0     |     2   |
|-------|-----------|--------|--------|---------|
|   C   |   1       |   0    |  2     |     3   |
|-------|-----------|--------|--------|---------|

我试图获得此结果，但它也包含重复记录。

使用分区查询：

select team,count(case when result='Won' then 1 else null end) over(PARTITION BY result,team ) as "Win",
count(case when result='Loss' then 1 else null end) over(PARTITION BY result,team) as "Loss",
count(case when result='Draw' then 1 else null end) over(PARTITION BY result,team) as "Draw"
from Tournament;

使用With Clause：

with t
as 
(select team,count(case when result='Won' then 1 else null end) over(PARTITION BY result,team ) as "Win",count(case when result='Loss' then 1 else null end) over(PARTITION BY result,team) as "Loss",count(case when result='Draw' then 1 else null end) over(PARTITION BY result,team) as "Draw"
from Tournament)
select distinct t.team, count(t."Win") as a,count(t."Loss") b,t."Draw" from t group by  t.team,t."Win",t."Loss",t."Draw" ;

Answer 1

您为什么使用vehicle？我通常使用此语法进行累计计数，如果您只是想要计数，那么请使用count() over()和COUNT() CASE EXPRESSION的常规GROUP BY：

select team,count(case when result='Won' then 1 end) as "Win",
            count(case when result='Loss' then 1 end) as "Loss",
            count(case when result='Draw' then 1 end) as "Draw",
            count(*) as total
from Tournament
GROUP BY team

此外，不需要ELSE NULL，因为它是CASE EXPRESSION的默认值。

Answer 2

不使用案例或分区的替代方法

SELECT * FROM （SELECT trim（upper（result））RESULT1，TEAMNAME FROM Tournament） PIVOT（计数（1）AS RESULT_COUNT FOR（RESULT1）IN（＆＃39; WIN＆＃39; AS WIN，＆＃39; LOSS＆＃39; AS LOSS，＆＃39; DRAW＆＃39; as DRAW））; < / p>