當它是GROUP BY中多個字段之一時，如何彙總單個字段的數據？

Question

我有一個表，看起來像這樣：

| loc_id | pilot_ind | last_form_step_completed | 
|--------|-----------|--------------------------| 
| 9988 | non-pilot | 1      | 
| 9988 | non-pilot | 1      | 
| 9988 | non-pilot | 2      | 
| 9988 | non-pilot | 2      | 
| 9988 | non-pilot | 2      | 
| 9988 | non-pilot | 3      | 
| 9988 | non-pilot | 3      | 
| 9988 | non-pilot | 4      | 
| 9988 | non-pilot | 4      | 
| 1122 | non-pilot | 1      | 
| 1122 | non-pilot | 2      | 
| 1122 | non-pilot | 2      | 
| 1122 | non-pilot | 2      | 
| 1122 | non-pilot | 3      | 
| 1122 | non-pilot | 4      | 
| 1122 | non-pilot | 5      | 
| 5544 | pilot  | 1      | 
| 5544 | pilot  | 1      | 
| 5544 | pilot  | 2      | 
| 5544 | pilot  | 2      | 
| 5544 | pilot  | 2      | 
| 5544 | pilot  | 3      | 
| 5544 | pilot  | 3      | 
| 5544 | pilot  | 4      | 
| 5544 | pilot  | 4      | 
| 5544 | pilot  | 5      | 
| 5544 | pilot  | 5      | 
| 5544 | pilot  | 5      | 
| 5544 | pilot  | 5      | 
| 5544 | pilot  | 5      | 
| 3344 | pilot  | 1      | 
| 3344 | pilot  | 2      | 
| 3344 | pilot  | 2      | 
| 3344 | pilot  | 3      | 
| 3344 | pilot  | 3      | 
| 3344 | pilot  | 3      | 
| 3344 | pilot  | 4      | 
| 3344 | pilot  | 4      | 
| 3344 | pilot  | 4      | 
| 3344 | pilot  | 5      | 
| 3344 | pilot  | 5      | 
| 3344 | pilot  | 5      | 

我要總結一下這樣的：

| pilot_ind | last_step_compl | total_count | total_per_pilot_ind | pct_pilot_ind_total | 
|-----------|-----------------|-------------|---------------------|---------------------| 
| non-pilot | 1    | 3   | 16     | 18.8%    | 
| non-pilot | 2    | 6   | 16     | 37.5%    | 
| non-pilot | 3    | 3   | 16     | 18.8%    | 
| non-pilot | 4    | 3   | 16     | 18.8%    | 
| non-pilot | 5    | 1   | 16     | 6.3%    | 
| pilot  | 1    | 3   | 26     | 11.5%    | 
| pilot  | 2    | 5   | 26     | 19.2%    | 
| pilot  | 3    | 5   | 26     | 19.2%    | 
| pilot  | 4    | 5   | 26     | 19.2%    | 
| pilot  | 5    | 8   | 26     | 30.8%    | 

我遇到麻煩了pilot_ind分組的總的total_per_pilot_ind場 - 我曾嘗試使用OVER（PARTITION BY），但結果不正確，因爲GROUP BY子句中有兩個字段。 這裏是一個鏈接到示例數據和當前的嘗試：http://rextester.com/PCE62786

select 
    r.pilot_ind 
    ,r.last_form_step_completed 
    ,count(*) total_count 
    ,count(*) over() 
from 
    results r 
group by 
    r.pilot_ind 
    ,r.last_form_step_completed 
order by 1,2 

編輯：有沒有辦法在一個查詢中這樣做嗎？

Answer 1

使用子查詢：

SELECT *, 
     sum(total_count) over(partition by pilot_ind) As total_per_pilot_ind, 
     round(100.0 * total_count/sum(total_count) over(partition by pilot_ind) ,1) 
     as pct_pilot_ind_total 
FROM (
select 
    r.pilot_ind 
    ,r.last_form_step_completed 
    ,count(*) total_count 
from 
    results r 
group by 
    r.pilot_ind 
    ,r.last_form_step_completed 
) x 
order by 1,2 

演示：http://sqlfiddle.com/#!17/0f411/5

Answer 2

你可以使用一個左連接

select 
     t.pilot_ind 
     , t.last_form_step_completed 
     , sum(a.last_form_step_completed) total_count 
    from ( 
    select distinct pilot_ind, last_form_step_completed 
    from my_table) t 
    left join my_table a on t.pilot_ind = a.pilot_ind 
     and t.last_form_step_completed = a.last_form_step_completed 
    group by t.pilot_ind 
     , t.last_form_step_completed 

（目前尚不清楚你如何讓你的樣品中的最後兩個欄..所以我忽略它們）

Answer 3

select a.pilot_id, a.last_step, a.total_count, b.total_per_pilot_ind, 
(a.total_count/ b.total_per_pilot_ind)*100 as Per_tage 
from 
(
select pilot_ind, last_form_step_completed as last_step, count(*) as total_count 
from table1 
group by pilot_ind, last_form_step_completed 
) a, 
(
select pilot_ind, sum(last_form_step_completed) as total_per_pilot_ind 
from table1 
group by pilot_id 
) b 
where a.pilot_ind=b.pilot_ind