Question

需要您的帮助。有此表：

Airline        WKS        TypePrint   nprints   Eventtime
UX        MAD2AKB503        BTP        1        2018-08-31 09:41:13.360
UX        MAD2AKB503        GPP        1        2018-08-31 09:41:32.723
UX        MAD2AKB503        GPP        1        2018-08-31 09:41:39.700
KLM       MAD2AKB426        GPP        1        2018-08-31 09:46:03.727
KLM       MAD2AKB426        GPP        1        2018-08-28 04:44:22.650
KLM       MAD2AKB426        GPP        1        2018-08-28 04:44:29.000
UX        MAD2AKB497        GPP        1        2018-08-29 06:03:24.517
KLM       MAD2AKB426        GPP        1        2018-08-31 10:10:23.193
KLM       MAD2AKB426        GPP        1        2018-08-31 10:10:30.837
UX        MAD1AKB223        GPP        1        2018-08-05 20:01:57.857

我想通过WKS分组汇总基于typeprint和Airline列的nprint。我尝试使用以下代码：

declare @fecha_inicio date='01-01-2018';
declare @fecha_fin date='12-01-2018';
declare @Airline_id varchar(10)='UX'

SELECT wks, 
       @Airline_id, 
       (SELECT Sum (Cast (nprints AS INT)) AS GPP 
        FROM   dw_prints2 B1 
        WHERE  ( B1.airline = @Airline_id ) 
               AND B1.typeprint = 'GPP' 
               AND ( ( B1.eventtime >= @Fecha_Inicio ) 
                     AND ( B1.eventtime <= @Fecha_Fin ) ) 
               AND A.wks = B1.wks) AS GPP, 
       (SELECT Sum (Cast (nprints AS INT)) AS BTP 
        FROM   dw_prints2 C1 
        WHERE  ( C1.airline = @Airline_id ) 
               AND C1.typeprint = 'BTP' 
               AND ( ( C1.eventtime >= @Fecha_Inicio ) 
                     AND ( C1.eventtime <= @Fecha_Fin ) ) 
               AND A.wks = C1.wks) AS BTP 
FROM   dw_prints2 A 
GROUP  BY wks 
ORDER  BY wks

返回：

wks Airline_id GPP BTP MAD1AKB223 UX 1 NULL MAD2AKB426 UX NULL NULL MAD2AKB497 UX 1 NULL MAD2AKB503 UX 2 1

但是，我的意图是在GPP和BTP的总和为NULL时不返回WKS。我的意思是：

wks Airline_id GPP BTP MAD1AKB223 UX 1 NULL MAD2AKB497 UX 1 NULL MAD2AKB503 UX 2 1

在此先感谢您的帮助。

Answer 1

无需使用子查询，只需使用条件聚合。并添加HAVING来过滤NULL结果

SELECT wks, 
       @Airline_id as Airline,
       Sum ( CASE WHEN typeprint = 'GPP'       
                  THEN Cast (nprints AS INT)
             END) AS GPP, 
       Sum ( CASE WHEN typeprint = 'BTP' 
                  THEN Cast (nprints AS INT)
             END) AS BTP,            
FROM dw_prints2
WHERE Airline = @Airline_id
  AND  eventtime >= @Fecha_Inicio 
  AND  eventtime <= @Fecha_Fin 
GROUP BY wks
HAVING
       Sum ( CASE WHEN typeprint = 'GPP'       
                  THEN Cast (nprints AS INT)
             END) IS NOT NULL            
   OR Sum ( CASE WHEN typeprint = 'BTP' 
                  THEN Cast (nprints AS INT)
             END) IS NOT NULL
ORDER BY wks

基于列值的总和，结果不为空

1 个答案: