User_ID |电影|选择

选择是1还是0.我想在每部电影后创建一个带有百分比选择（1s）的谷歌图表。我可以在excel中生成如下：

excel

有没有办法生成具有这些运行总计的结果，而无需在表格中创建新列？（类似于SUM）

第一行应该是1，但设置为0只是为了让图表看起来更好！

Answer 1

第一行应该是100％，对吗？ 1票，1票等于100％

create table runningp(id int auto_increment primary key, choice tinyint);

insert into runningp(choice) values (1),(0),(0),(1),(1),(0),(1),(1),(0),(0);

select r.*, @p:=@p+choice, @t:=@t+1, @p/@t as yes 
from runningp r, 
(select @p:=0, @t:=0) v
order by id;

+----+--------+---------------+----------+--------+
| id | choice | @p:=@p+choice | @t:=@t+1 | yes    |
+----+--------+---------------+----------+--------+
|  1 |      1 |             1 |        1 | 1.0000 |
|  2 |      0 |             1 |        2 | 0.5000 |
|  3 |      0 |             1 |        3 | 0.3333 |
|  4 |      1 |             2 |        4 | 0.5000 |
|  5 |      1 |             3 |        5 | 0.6000 |
|  6 |      0 |             3 |        6 | 0.5000 |
|  7 |      1 |             4 |        7 | 0.5714 |
|  8 |      1 |             5 |        8 | 0.6250 |
|  9 |      0 |             5 |        9 | 0.5556 |
| 10 |      0 |             5 |       10 | 0.5000 |
+----+--------+---------------+----------+--------+

只需选择您需要的内容：

select id, choice, yes from (
select r.*, @p:=@p+choice, @t:=@t+1, @p/@t as yes 
from runningp r, 
(select @p:=0, @t:=0) v
order by id
) sq
order by id;

+----+--------+--------+
| id | choice | yes    |
+----+--------+--------+
|  1 |      1 | 1.0000 |
|  2 |      0 | 0.5000 |
|  3 |      0 | 0.3333 |
|  4 |      1 | 0.5000 |
|  5 |      1 | 0.6000 |
|  6 |      0 | 0.5000 |
|  7 |      1 | 0.5714 |
|  8 |      1 | 0.6250 |
|  9 |      0 | 0.5556 |
| 10 |      0 | 0.5000 |
+----+--------+--------+
10 rows in set (0.00 sec)

Answer 2

假设@fancyPants是正确的（通常是），那么你也可以这样写（稍微简单，可扩展性较差）......

SELECT x.*
     , SUM(y.choice)/COUNT(*) * 100 pct 
  FROM film_choice x 
  JOIN film_choice y 
    ON y.film <= x.film 
 GROUP 
    BY x.film;

SQL运行百分比

User_ID |电影|选择

2 个答案: