GROUP BY 表达式必须包含至少一列不是外部引用

Question

有几篇关于同一主题的帖子，我已经阅读了它们……但尽我所能，我无法将它们应用于我的问题。我确定我忽略了一些愚蠢的东西。

我要做的是向患者展示在特定日期和时间躺在床上的患者。每个病人都有一个入院和出院日期，所以我用这些来确定他们在那个特定的日期和时间是否在床上。如果我列出所有内容，它会很好用。现在我正在尝试做一个总结，所以它只显示这个位置给定日期的 3 名住院病人和 1 名门诊病人，等等。但我在标题中收到错误消息。

SELECT DISTINCT TSM950_STATION.loc_ext_id AS STATION, 
convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) AS CENSUS_DATE,
                  TSM180_CAT.cod_dtl_ds,
                  COUNT(TPM300_PAT_VISIT.vst_ext_id)
FROM         TPM300_PAT_VISIT INNER JOIN
                  TSM040_PERSON_HDR ON TPM300_PAT_VISIT.psn_int_id = TSM040_PERSON_HDR.psn_int_id INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_ROOM ON TPM300_PAT_VISIT.loc_lvl_4_id = TSM950_ROOM.loc_int_id INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_BED ON TPM300_PAT_VISIT.loc_lvl_5_id = TSM950_BED.loc_int_id  INNER JOIN
                  TSM950_LOCATION_REF AS TSM950_STATION ON TPM300_PAT_VISIT.loc_lvl_3_id = TSM950_STATION.loc_int_id INNER JOIN
                  TSM180_MST_COD_DTL AS TSM180_CAT ON TPM300_PAT_VISIT.pat_cat_cd = TSM180_CAT.cod_dtl_int_id
WHERE     (TSM950_STATION.loc_ext_id IN ('MS', 'OB', 'SCU', 'NURS')) AND 
        (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.adm_ts,101) +' 00:00:00'))<=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:58:00') AND
        (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.dschrg_ts,101) +' 00:00:00'))>=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:59:00')
GROUP BY        TSM950_STATION.loc_ext_id, 
                 convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101),
                  TSM180_CAT.cod_dtl_ds 

Answer 1

您不需要同时使用DISTINCT 和GROUP BY。根据定义，记录将是不同的，因为所有相似的记录都在同一个组中......

另外，您不需要GROUP BY 一个常量。

这给...

SELECT    TSM950_STATION.loc_ext_id AS STATION,
          convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) AS CENSUS_DATE,
          TSM180_CAT.cod_dtl_ds,
          COUNT(TPM300_PAT_VISIT.vst_ext_id)
FROM      TPM300_PAT_VISIT INNER JOIN
          TSM040_PERSON_HDR ON TPM300_PAT_VISIT.psn_int_id = TSM040_PERSON_HDR.psn_int_id INNER JOIN
          TSM950_LOCATION_REF AS TSM950_ROOM ON TPM300_PAT_VISIT.loc_lvl_4_id = TSM950_ROOM.loc_int_id INNER JOIN
          TSM950_LOCATION_REF AS TSM950_BED ON TPM300_PAT_VISIT.loc_lvl_5_id = TSM950_BED.loc_int_id  INNER JOIN
          TSM950_LOCATION_REF AS TSM950_STATION ON TPM300_PAT_VISIT.loc_lvl_3_id = TSM950_STATION.loc_int_id INNER JOIN
          TSM180_MST_COD_DTL AS TSM180_CAT ON TPM300_PAT_VISIT.pat_cat_cd = TSM180_CAT.cod_dtl_int_id
WHERE         (TSM950_STATION.loc_ext_id IN ('MS', 'OB', 'SCU', 'NURS'))
          AND (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.adm_ts,101) +' 00:00:00'))<=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:58:00')
          AND (convert(datetime,convert(varchar(10),TPM300_PAT_VISIT.dschrg_ts,101) +' 00:00:00'))>=convert(datetime,convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101) +' 23:59:00')
GROUP BY  TSM950_STATION.loc_ext_id, 
          TSM180_CAT.cod_dtl_ds 

Answer 2

问题是下面的表达式是一个常量：

convert(varchar(10),DATEADD(DAY,-7,GETDATE()),101), 

只需将其从您的组中删除，如下所示：

GROUP BY TSM950_STATION.loc_ext_id, TSM180_CAT.cod_dtl_ds