Teradata 聚合函数 GROUP BY

Question

您好，我收到错误，因为 GROUP BY 和 WITH BY CLAUSE 可能不包含以下查询的聚合函数。

SELECT 
distinct CC.CASE_ID as CASE_ID,
/*FIRST_VALUE(CC.CASE_OWN_NM) OVER(PARTITION BY CC.CASE_ID )as  FST_AGNT_CASE_OWN_NM,
FIRST_VALUE(CC.LSTMOD_BY_AGNT_PRFL_NM) OVER(PARTITION BY CC.CASE_ID)as  FST_AGNT_PRFL_NM,
LAST_VALUE(CC.CASE_OWN_NM) OVER(PARTITION BY CC.CASE_ID) as     LST_AGNT_CASE_OWN_NM,
LAST_VALUE(CC.LSTMOD_BY_AGNT_PRFL_NM) OVER(PARTITION BY CC.CASE_ID)  as  LST_AGNT_PRFL_NM,*/
case when CC.CASE_OWN_NM is not null then MIN(CC.REC_DTTM_PST) end as FST_AGNT_EDIT_DTTM,
case when CC.CASE_OWN_NM is not null then MAX(CC.REC_DTTM_PST)  end as LST_AGNT_EDIT_DTTM,
case when CC.CASE_STS_CD='Open'  then MIN(CC.REC_DTTM_PST) end as CASE_OPEN_DTTM,
case when CC.CASE_STS_CD in ( 'Closed', 'Auto Closed') then MIN(CC.REC_DTTM_PST) end as CASE_CLSE_OR_AUTO_CLSE_DTTM

--CC.PU_DTTM as LMI_PU_DTTM,
--CC.CLS_DTTM as LMI_CLS_DTTM

FROM EDW_KATAMARI_T.CNTCT_CASE CC
INNER JOIN EDW_KATAMARI_T.CNTCT_CASE_EXTN CCE
ON CC.CNTCT_CASE_APND_KEY = CCE.CNTCT_CASE_APND_KEY
INNER JOIN EDW_STAGE_COMN_SRC.STG_CNTCT_CASE_DELTA  DELTA
on CC.CASE_ID = DELTA.CASE_ID
where CC.CASE_ID='23268760'
    group by 1,2,3,4,5 

当我只使用第 1 组时，它仍然给出非聚合函数必须是 group by 的一部分。

Answer 1

您需要将CASEs 移动到聚合中：

MIN(CASE WHEN CC.CASE_OWN_NM IS NOT NULL THEN CC.REC_DTTM_PST END) AS FST_AGNT_EDIT_DTTM,
MAX(CASE WHEN CC.CASE_OWN_NM IS NOT NULL THEN CC.REC_DTTM_PST END) AS LST_AGNT_EDIT_DTTM,
MIN(CASE WHEN CC.CASE_STS_CD='Open'  THEN CC.REC_DTTM_PST END) AS CASE_OPEN_DTTM,
MIN(CASE WHEN CC.CASE_STS_CD IN ( 'Closed', 'Auto Closed') THEN CC.REC_DTTM_PST END) AS CASE_CLSE_OR_AUTO_CLSE_DTTM

那么GROUP BY 1 就可以了