怎么样：
PARAMETERS [CurrAxe] TEXT ( 255 ), [CurrOTP] TEXT ( 255 ), [CurrClient] TEXT (
255 ), [StartDate] DATETIME, [EndDate] DATETIME;
SELECT q.Projet, *
FROM (faitssaillants f
LEFT JOIN employes e
ON f.utilisateur = e.cip)
INNER JOIN (
SELECT s1.otp,
[s1].[valeur] & "," & [s2].[valeur] AS Projet
FROM (
SELECT otp, valeur
FROM tb_sommaire
WHERE [variable] = 'TitreMandat') AS s1
INNER JOIN (
SELECT otp, valeur
FROM tb_sommaire
WHERE [variable] = 'NomInstallation') AS s2
ON s1.otp = s2.otp) q
ON f.otp = q.otp
WHERE f.otp = [currotp]
AND f.client LIKE [currclient]
AND f.axe LIKE [curraxe]
AND Datevalue([dateinsertion])
Between [startdate] And [enddate]
ORDER BY f.dateinsertion DESC;
始终最好避免将所有字段都引用为*。字段（列）应按名称列出。
以上内容取决于创建一个派生表，该表将Otp对tb_sommaire中的行进行分组。您可以将派生表剪切并粘贴到查询设计屏幕（sql视图）中，以检查返回的行是否符合预期。
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