仅选择MAX日期记录
我有这个庞大的（不那么庞大的）SQL查询：
SELECT DISTINCT TABVEIC.NU_STATUS,
S.CD_STATUS_SMP,
S.CD_SMP,
S.NU_SMP,
S.NU_ANO_SMP,
CASE
WHEN TABVEIC.CD_SMP IS NOT NULL THEN
SPLIT(FNC_TMA_SINALEIRA(TABVEIC.CD_SMP), 3, ';')
ELSE
'00:00'
END AS TMA_ONLINE,
CASE
WHEN (SPOA.DT_SAIDA_PONTO IS NULL OR
SPEA.DT_SAIDA_PONTO IS NULL) THEN
(CASE
WHEN EXISTS (SELECT 1
FROM TB_SMP
WHERE CD_SMP = TABVEIC.CD_SMP
AND CD_STATUS_SMP IN (2, 9, 11)) THEN
FNC_RETORNA_SINALEIRA_SMP(TABVEIC.CD_SMP)
ELSE
-1
END)
ELSE
6
END SINALEIRA,
CASE
WHEN EXISTS (SELECT 1
FROM TB_ENTIDADE_RECURSO_ENTIDADE EE
WHERE EE.CD_ENTIDADE =
(SELECT CD_ENTIDADE_CLIENTE
FROM TB_SMP
WHERE CD_SMP = TABVEIC.CD_SMP)
AND EE.CD_ENTIDADE_RECURSO = 81) THEN
'SINALEIRA'
END STATUS_ATUAL,
TABVEIC.NU_LATITUDE,
TABVEIC.NU_LONGITUDE,
TABVEIC.DS_PLACA_VEICULO,
CASE
WHEN S.CD_STATUS_SMP IN (2, 9, 11) THEN
S.DS_DOCUMENTO_NF
ELSE
NULL
END DS_DOCUMENTO_NF,
CASE
WHEN S.CD_STATUS_SMP IN (2, 9, 11) THEN
PGORIGEM.DS_APELIDO
ELSE
NULL
END DS_ORIGEM_APELIDO,
CASE
WHEN S.CD_STATUS_SMP IN (2, 9, 11) THEN
(CASE
WHEN S.DT_SAIDA_PONTO_ORIGEM IS NULL THEN
S.DT_ENTRADA_PONTO_ORIGEM
ELSE
SPE.DT_ENTRADA_PONTO
END)
ELSE
TABVEIC.DT_TIME_POSITION
END AS DT_ENTRADA_ALVO,
CASE
WHEN S.DT_SAIDA_PONTO_ORIGEM IS NULL THEN
SPOA.DT_ENTRADA_PONTO
ELSE
SPEA.DT_ENTRADA_PONTO
END AS DT_ENTRADA_SUB_ALVO,
CASE
WHEN S.DT_SAIDA_PONTO_ORIGEM IS NULL THEN
SPOA.DT_SAIDA_PONTO
ELSE
SPEA.DT_SAIDA_PONTO
END AS DT_SAIDA_SUB_ALVO,
CASE
WHEN S.DT_SAIDA_PONTO_ORIGEM IS NULL THEN
'PONTO DE ORIGEM IS NULL'
ELSE
'PONTO DE ORIGEM IS NOT NULL'
END AS DT_SAIDA_SUB_ALVO,
ATUALIZADO
FROM
(SELECT
(SELECT MAX(SP.CD_SMP)
FROM TB_SMP_VEICULO SP
WHERE SP.CD_VEICULO = VC.CD_VEICULO) CD_SMP,
VC.NU_STATUS,
VC.DS_PLACA_VEICULO,
RAS.NU_LATITUDE,
RAS.NU_LONGITUDE,
RAS.DT_TIME_POSITION,
SYSDATE,
-- COUNT(1) AS REGISTROS, -- CD_PONTO_GEO = 3004949
CASE
WHEN TRUNC((SYSDATE - RAS.DT_TIME_POSITION) * 1440, 2) > 25 THEN
'N'
ELSE
'S'
END AS ATUALIZADO
FROM TB_VEICULO VC
INNER JOIN TB_RASTREADOR RAS
ON RAS.CD_RASTREADOR = VC.CD_RASTREADOR
WHERE VC.CD_ENTIDADE IN (178, 204, 821, 896, 999, 1000, 1006, 1025, 1031, 1058, 1079, 1094, 1095, 1103, 1318, 1539, 1630, 1644, 1650, 1653, 1679, 1684, 1751, 1755, 1787, 1794, 1795, 1808, 1810, 1835, 1949, 1988, 2015, 2030, 2035, 2069, 2072, 2115, 2127, 2138, 2144, 2223, 7377, 7462, 7790, 7925, 7930, 8161, 8186, 8199, 8256, 8257, 8258, 8511, 8552, 8769, 8829, 8946, 8963, 9440, 9441, 9520, 9535, 9536, 9543, 9700, 9838, 9887, 9888, 9889, 9890, 9933, 9934, 9935, 9936, 9937, 9938, 9939, 9943, 9944, 9959, 10084, 10353, 10373, 10397, 10663, 10681, 10803, 10804, 10805, 10807, 10808, 10854, 10922, 10926, 10952, 10962, 10963, 11000, 11204, 11328, 11329, 11330, 11400, 11453, 11480, 11484, 11485, 11493, 11521, 11523, 11540, 11559, 11610, 11628, 12007, 12099, 12171, 12182, 12188, 12189, 12191, 12192, 12238, 12247, 12248, 12249, 12264, 12269, 12277, 12278, 12288, 12320, 12325, 12329, 12330, 12335, 12380, 12385, 12386, 12387, 12419, 12423, 12438, 12446, 12449, 12492, 12493, 12494, 12504, 12532, 12541, 12542, 12558, 12574, 12632, 12653, 12660, 12673, 12682, 12711, 12725, 12727, 12732, 12743, 12750, 12767, 12774, 13393, 22858, 23176, 23254, 23522, 23523, 23524, 23532, 23576, 23577, 23581, 23587, 23602, 23607, 23637, 23638, 23639, 23661, 23668, 23669, 23678, 23680, 23686, 23696, 23703, 23715, 23733, 23748, 23761, 23802, 23808, 23815, 23827, 23828, 23874, 23936, 24074, 24075, 24091, 24118, 24154, 24162, 24204, 24219, 24232, 24254, 24255, 24261, 24271, 24290, 24301, 24309, 24370, 24382, 24385, 24394, 24395, 24396, 24455, 24530, 24541, 24673, 24674, 24675, 24739, 24765, 24805, 24813, 24897, 24921, 24936, 24989, 24993, 24994, 24995, 25084, 25153, 25193, 25247, 25294, 25306, 25313, 25314, 25355, 25362, 25436, 25764, 25854, 25894, 25895, 26075, 26082, 0)
AND (RAS.NU_LATITUDE IS NOT NULL AND RAS.NU_LONGITUDE IS NOT NULL)
AND VC.NU_STATUS = 1
AND RAS.FL_LOCALIZADOR = 'N'
AND RAS.NU_STATUS = 1
AND FNC_VALIDA_DENTRO_PONTO(&CD_PONTO_GEO,
NU_LATITUDE,
NU_LONGITUDE) = 1) TABVEIC
LEFT JOIN TB_SMP S
ON S.CD_SMP = TABVEIC.CD_SMP
LEFT JOIN TB_SMP_PONTO_ORIGEM_AREA SPOA
ON SPOA.CD_SMP = TABVEIC.CD_SMP
LEFT JOIN TB_SMP_PONTO_ENTREGA SPE
ON SPE.CD_SMP = S.CD_SMP
LEFT JOIN TB_SMP_PONTO_ENTREGA_AREA SPEA
ON SPEA.CD_SMP_PONTO_ENTREGA = SPE.CD_SMP_PONTO_ENTREGA
LEFT JOIN TB_PONTO_GEOREFERENCIADO PGORIGEM
ON PGORIGEM.CD_PONTO_GEOREFERENCIADO = S.CD_PONTO_GEO_ORIGEM AND S.CD_STATUS_SMP IN (2, 9)
我的问题是我必须只从这个LEFT JOIN TB_SMP_PONTO_ORIGEM_AREA SPOA或此LEFT JOIN TB_SMP_PONTO_ENTREGA_AREA联接中获取最后一个日期，根据这个条件（即SQL的主体）：
CASE
WHEN S.DT_SAIDA_PONTO_ORIGEM IS NULL THEN
SPOA.DT_ENTRADA_PONTO
ELSE
SPEA.DT_ENTRADA_PONTO
END AS DT_ENTRADA_SUB_ALVO
我已经尝试将这个语句放在select：
的末尾 WHERE SPEA.DT_ENTRADA_PONTO IN (select MAX(SPEnt.DT_ENTRADA_PONTO) FROM TB_SMP_PONTO_ENTREGA_AREA SPEnt
where SPEnt.CD_SMP_PONTO_ENTREGA = SPE.CD_SMP_PONTO_ENTREGA)
它会停止显示具有不同日期的相同记录，但不会带来其他结果。
我的结果使用where：
我的结果没有：
在第二张图片中，我们可以从id：1254190
所以我的问题是如何检索忽略日期“DT_ENTRADA_PONTO”或获取其MAX值的非重复记录？
谢谢你们！
修改
解决方案：
我只改变了这些JOIN：
LEFT JOIN TB_SMP S
ON S.CD_SMP = TABVEIC.CD_SMP
LEFT JOIN (SELECT SPOADESC.CD_SMP, SPOADESC.DT_SAIDA_PONTO, SPOADESC.DT_ENTRADA_PONTO
FROM (SELECT * FROM TB_SMP_PONTO_ORIGEM_AREA SPOA
WHERE SPOA.DT_ENTRADA_PONTO IN (SELECT MAX(DT_Entrada_ponto) from TB_SMP_PONTO_ENTREGA)
) SPOADESC ) SPOADESC2
ON SPOADESC2.CD_SMP = TABVEIC.CD_SMP
LEFT JOIN TB_SMP_PONTO_ENTREGA SPE
ON SPE.CD_SMP = S.CD_SMP
LEFT JOIN (SELECT SPEADESC.CD_SMP_PONTO_ENTREGA, SPEADESC.DT_SAIDA_PONTO, SPEADESC.DT_ENTRADA_PONTO
FROM (SELECT * FROM TB_SMP_PONTO_ENTREGA_AREA SPEA
WHERE SPEA.DT_ENTRADA_PONTO IN (SELECT MAX(DT_Entrada_ponto) from TB_SMP_PONTO_ENTREGA)
) SPEADESC ) SPEADESC2
ON SPE.CD_SMP_PONTO_ENTREGA = SPEADESC2.CD_SMP_PONTO_ENTREGA
现在它有效！
1 个答案:
答案 0 :(得分：2)
不确定Oracle语法，但在加入表时，加入PK =表的TOP 1子查询的PK，按日期列降序排序。
以下是我将如何在SQL Server中执行此操作：
LEFT JOIN MyTable t1 ON t1.PK=(
SELECT TOP 1 PK
FROM MyTable t2
WHERE SomeCondition=true
ORDER BY DateColumn DESC
)
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