Sql 仅获取一个具有最早日期值的结果
我有一个返回如下值的查询:Sql 仅获取一个具有最早日期值的结果,sql,sql-server,Sql,Sql Server,我有一个返回如下值的查询: ;With wholeData AS ( SELECT TuId as TeiluberId, TU_Sem_ID AS SeminarId, TU_HotAnreiseDatum AS Anreise, TU_HotAbreiseDatum AS Abreise ,sem.Sem_von,sem.Sem_bis FROM [WinClient].[TeilnehmerVerpflegungSeminar] tns LEFT J
;With wholeData AS
(
SELECT TuId as TeiluberId, TU_Sem_ID AS SeminarId, TU_HotAnreiseDatum AS Anreise, TU_HotAbreiseDatum AS Abreise
,sem.Sem_von,sem.Sem_bis
FROM [WinClient].[TeilnehmerVerpflegungSeminar] tns
LEFT JOIN acc_seminar.t_Teiluber ON TuId = TU_ID
JOIN acc_seminar.t_Seminar sem ON sem_id = TU_Sem_ID
WHERE CONVERT(date,tns.Datum) < CONVERT(date, sem_von)
GROUP BY TuId, TU_Name, TU_Vorname, VpId, TU_Typ, TU_Sto, tu_sem_id, TU_HotAnreiseDatum, TU_HotAbreiseDatum, sem.Sem_von, sem.Sem_bis
UNION ALL
SELECT TU_ID, TU_Sem_ID, TU_HotAnreiseDatum, ISNULL(TU_HotAbreiseDatum, CONVERT(date, sem_bis)) AS Abreise, Sem_von, Sem_bis
FROM acc_seminar.t_Teiluber
JOIN acc_seminar.t_Seminar ON sem_id = TU_Sem_ID
WHERE TU_ID NOT IN (SELECT tvs.TuId FROM [WinClient].[TeilnehmerVerpflegungSeminar] tvs) AND TU_HotAnz > 0
AND TU_HotAnreiseDatum IS NOT NULL AND (CONVERT(date, TU_HotAnreiseDatum) != CONVERT(date, sem_von) OR CONVERT(date, TU_HotAbreiseDatum) != CONVERT(date, sem_bis))
)
SELECT q1.* from wholeData q1
JOIN (select SeminarId, MIN(Anreise) from WholeData group by SeminarId) q2
ON q1.SeminarId = q2.SeminarId AND q1.Anreise = q2.Anreise
WHERE q1.SeminarId = @Sem_ID
如您所见,我得到了多个具有相同“半干旱”值的结果。我希望得到具有最低“Anreise”日期值的结果,并返回一个具有最早日期的结果
我尝试使用MIN,但我得到了一个聚合函数错误,我没有其他想法
SELECT * FROM
(
SELECT TuId as TeiluberId, TU_Sem_ID AS SeminarId, TU_HotAnreiseDatum AS Anreise, TU_HotAbreiseDatum AS Abreise
,sem.Sem_von,sem.Sem_bis
FROM [WinClient].[TeilnehmerVerpflegungSeminar] tns
LEFT JOIN acc_seminar.t_Teiluber ON TuId = TU_ID
JOIN acc_seminar.t_Seminar sem ON sem_id = TU_Sem_ID
WHERE CONVERT(date,tns.Datum) < CONVERT(date, sem_von)
GROUP BY TuId, TU_Name, TU_Vorname, VpId, TU_Typ, TU_Sto, tu_sem_id, TU_HotAnreiseDatum, TU_HotAbreiseDatum, sem.Sem_von, sem.Sem_bis
UNION ALL
SELECT TU_ID, TU_Sem_ID, TU_HotAnreiseDatum, ISNULL(TU_HotAbreiseDatum, CONVERT(date, sem_bis)) AS Abreise, Sem_von, Sem_bis
FROM acc_seminar.t_Teiluber
JOIN acc_seminar.t_Seminar ON sem_id = TU_Sem_ID
WHERE TU_ID NOT IN (SELECT tvs.TuId FROM [WinClient].[TeilnehmerVerpflegungSeminar] tvs) AND TU_HotAnz > 0
AND TU_HotAnreiseDatum IS NOT NULL AND (CONVERT(date, TU_HotAnreiseDatum) != CONVERT(date, sem_von) OR CONVERT(date, TU_HotAbreiseDatum) != CONVERT(date, sem_bis))
) tu
WHERE tu.SeminarId = @Sem_ID
您可以像这样使用with命令:
;With wholeData AS
(
SELECT TuId as TeiluberId, TU_Sem_ID AS SeminarId, TU_HotAnreiseDatum AS Anreise, TU_HotAbreiseDatum AS Abreise
,sem.Sem_von,sem.Sem_bis
FROM [WinClient].[TeilnehmerVerpflegungSeminar] tns
LEFT JOIN acc_seminar.t_Teiluber ON TuId = TU_ID
JOIN acc_seminar.t_Seminar sem ON sem_id = TU_Sem_ID
WHERE CONVERT(date,tns.Datum) < CONVERT(date, sem_von)
GROUP BY TuId, TU_Name, TU_Vorname, VpId, TU_Typ, TU_Sto, tu_sem_id, TU_HotAnreiseDatum, TU_HotAbreiseDatum, sem.Sem_von, sem.Sem_bis
UNION ALL
SELECT TU_ID, TU_Sem_ID, TU_HotAnreiseDatum, ISNULL(TU_HotAbreiseDatum, CONVERT(date, sem_bis)) AS Abreise, Sem_von, Sem_bis
FROM acc_seminar.t_Teiluber
JOIN acc_seminar.t_Seminar ON sem_id = TU_Sem_ID
WHERE TU_ID NOT IN (SELECT tvs.TuId FROM [WinClient].[TeilnehmerVerpflegungSeminar] tvs) AND TU_HotAnz > 0
AND TU_HotAnreiseDatum IS NOT NULL AND (CONVERT(date, TU_HotAnreiseDatum) != CONVERT(date, sem_von) OR CONVERT(date, TU_HotAbreiseDatum) != CONVERT(date, sem_bis))
)
SELECT q1.* from wholeData q1
JOIN (select SeminarId, MIN(Anreise) from WholeData group by SeminarId) q2
ON q1.SeminarId = q2.SeminarId AND q1.Anreise = q2.Anreise
WHERE q1.SeminarId = @Sem_ID
您可以使用行号
@是的,对不起!编辑我的问题。