在使用case when语句时不是单组分组功能

Question

在查询中，我尝试使用关键字关键字时的大小写。 我必须在那里检查3个条件。 但是我收到了“不是单组分组函数错误”的提示。 查询中是否存在语法错误？ 请指导。

查询为

SELECT  
        CASE WHEN DIST_TYPE_ID IN (5033,5034,5035,5036) 
        THEN MIN (b2b_start_dt +NVL(access_lead_Days,0))
        ELSE 
             CASE WHEN MAX(overridden) = 0 
             THEN NVL (MIN (src_start_dt), MIN (b2b_start_dt)) 
             ELSE MAX(B2B_START_dT) END 
        END as start_date 

FROM    prog_access_movie_v         

WHERE   trunc(SYSDATE) BETWEEN b2b_start_dt AND b2b_end_dt      
        AND (user_id IS NOT NULL OR GROUP_ID IS NOT NULL)        
        AND dist_type_id IN (5034) AND prog_id = (432899)

Answer 1

这是select ：

SELECT  (CASE WHEN DIST_TYPE_ID IN (5033, 5034, 5035, 5036) 
              THEN MIN(b2b_start_dt + NVL(access_lead_Days, 0))
              ELSE (CASE WHEN MAX(overridden) = 0 
                         THEN NVL(MIN(src_start_dt), MIN(b2b_start_dt)) 
                         ELSE MAX(B2B_START_dT)
                    END)
         END) as start_date 

就聚合而言，除了DIST_TYPE_ID上的条件之外，一切都很好。 如果你有：

SELECT  (CASE WHEN MAX(DIST_TYPE_ID) IN (5033, 5034, 5035, 5036) 
              THEN MIN(b2b_start_dt + NVL(access_lead_Days, 0))
              ELSE (CASE WHEN MAX(overridden) = 0 
                         THEN NVL(MIN(src_start_dt), MIN(b2b_start_dt)) 
                         ELSE MAX(B2B_START_dT)
                    END)
         END) as start_date 

要么：

SELECT  (CASE WHEN SUM(CASE WHEN DIST_TYPE_ID IN (5033, 5034, 5035, 5036) THEN 1 ELSE 0 END) > 0
              THEN MIN(b2b_start_dt + NVL(access_lead_Days, 0))
              ELSE (CASE WHEN MAX(overridden) = 0 
                         THEN NVL(MIN(src_start_dt), MIN(b2b_start_dt)) 
                         ELSE MAX(B2B_START_dT)
                    END)
         END) as start_date 

或无数其他可能性，则查询应解析并执行。

Answer 2

我这是一个愚蠢的错误。 按dist_type_id分组。

SELECT  CASE WHEN DIST_TYPE_ID IN (5033,5034,5035,5036) THEN MIN (b2b_start_dt +NVL(access_lead_Days,0))
 ELSE CASE WHEN MAX(overridden) = 0 THEN NVL (MIN (src_start_dt), MIN (b2b_start_dt)) ELSE MAX(B2B_START_dT) END END as start_date

 FROM prog_access_movie_v         
 WHERE trunc(SYSDATE) BETWEEN b2b_start_dt AND b2b_end_dt       
 AND (user_id IS NOT NULL OR GROUP_ID IS NOT NULL)        
 AND dist_type_id IN (5034) AND prog_id = (432899)
 group by access_lead_days, dist_type_id