Oracle SQL查詢以特定格式獲取輸出

Question

我有以下數據的Oracle數據庫表“ mytable”

Sr_NO    Name   Status  Date
121      HP     OK     12/06/2018
122      Dell   OK     15/06/2018
123      MAC    NOK    30/07/2018
124      Apple  NOK    03/09/2018
125      MI     NOK    04/09/2018
126      Oppo   NOK    05/09/2018
127      Vivo   OK     06/09/2018

我想以以下格式獲取輸出-

Category        Count   OK  NOK
Till 30th Jul   3       2   1
After 30th Jul  4       1   3
Total           7       3   4

Answer 1

您可以使用條件聚合來獲取列和grouping sets來獲取其他行：

select (case when date <= '2018-07-30' then 'Till 30th Jul'
             else 'After 30th Jul'
        end) as category,
       count(*),
       sum(case when status = 'OK' then 1 else 0 end) as OK,
       sum(case when status = 'NOK' then 1 else 0 end) as NOK
from t
group by grouping sets ( ( (case when date <= '2018-07-30' then 'Till 30th Jul'
                                 else 'After 30th Jul'
                             end)
                         ),
                         ()
                        );

您可以將total添加為類別（在您的情況下），使用與NULL的比較：

select (case when date is null then 'Total'
             when date <= '2018-07-30' then 'Till 30th Jul'
             else 'After 30th Jul'
        end) as category,

您的數據中沒有NULL日期，所以很好。 否則，您應該使用GROUPING() 。

Answer 2

請勿將DATE和COUNT類的Oracle關鍵字用作列名。 我將其更改為DT和CT 。

對於GROUP BY ROLLUP ，這是一項簡單的工作，在您創建了附加列FLAG以顯示每行所屬的組之后。 我在“ 2018年7月30日之前”將標志創建為'b' ”-否則標志為NULL。 （這允許我也使用ORDER BY的標志，因為默認情況下， FLAG排序為NULLS LAST 。）

請記住，在運行查詢之前，請完全刪除 WITH子句，並使用實際的表名和列名。

alter session set nls_date_format = 'dd/mm/yyyy';

with
  test_data (sr_no, name, status, dt) as (
    select 121, 'HP'   , 'OK' , to_date('12/06/2018') from dual union all
    select 122, 'Dell' , 'OK' , to_date('15/06/2018') from dual union all
    select 123, 'MAC'  , 'NOK', to_date('30/07/2018') from dual union all
    select 124, 'Apple', 'NOK', to_date('03/09/2018') from dual union all
    select 125, 'MI'   , 'NOK', to_date('04/09/2018') from dual union all
    select 126, 'Oppo' , 'NOK', to_date('05/09/2018') from dual union all
    select 127, 'Vivo' , 'OK' , to_date('06/09/2018') from dual
  )
select case grouping_id(flag) when 0
                              then case flag when 'b' then 'Till 30th July'
                                             else          'After 30th July'
                                   end
                              else                         'Total'
       end                                      as category
     , count(status)                            as ct
     , count(case status when 'OK' then 0 end)  as ok
     , count(case status when 'NOK' then 0 end) as nok
from   ( select sr_no, name, status, dt, 
                case when dt <= date '2018-07-30' then 'b' end as flag
         from   test_data
       )
group by rollup(flag)
order by grouping_id(flag), flag
;

CATEGORY                CT         OK        NOK
--------------- ---------- ---------- ----------
Till 30th July           3          2          1
After 30th July          4          1          3
Total                    7          3          4