Sql ODBC连接中的多个联接问题

我通过ODBC连接到NetSuite数据库，并为数据库创建了一个相当大的查询以运行报告。我把代码放在这篇文章的末尾。我的问题是，查询排除了“交易伙伴ID”字段中为空的“A\U T\U项目”表中的行。我知道我可以在这里使用一个正确的外部联接，但是我似乎无法使它工作，因为我正在联接其他几个表。有什么建议我可以试试吗

该连接是只读的，因此没有临时表——我希望它可以在单个查询中工作。谢谢你的时间

SELECT
    [A_T_CUSTOMERS].[COMPANYNAME] AS [Company Name],
    [A_T_MILESTONES].[PROJECT_MILESTONE_NAME] AS [Name],
    [A_T_PROJECTS].[COMPANYNAME] AS [Project Name],
    [A_T_STATUS].[LIST_ITEM_NAME] AS [Status],
    [A_T_MILESTONES].[DUE_DATE] AS [Milestone Due],
    [A_T_ACTIONREQ].[LIST_ITEM_NAME] AS [Action Required By],
    [A_T_PARTNERS].[COMPANYNAME] AS [Trading Partner],
    [A_T_EMPLOYEES].[FULL_NAME] AS [Assigned To],
    [A_T_CUSTOMERS].[ESTIMATED_DELIVERY_DATE] AS [Est Del Date],
    CASE
            WHEN [A_T_MILESTONES].[PROJECT_MILESTONE_NAME] = 'Project Complete/Move to Production'
                    THEN [A_T_MILESTONES].[DUE_DATE]
            ELSE NULL
    END AS [Est Move to Prod]

FROM
    [CUSTOMERS] AS [A_T_CUSTOMERS],
    [CUSTOMERS] AS [A_T_PROJECTS],
    [PROJECT_MILESTONE] AS [A_T_MILESTONES],
    [PARTNERS] AS [A_T_PARTNERS],
    [STATUS] AS [A_T_STATUS],
    [ACTION_REQUIRED] AS [A_T_ACTIONREQ],
    [EMPLOYEES] AS [A_T_EMPLOYEES]
    --RIGHT OUTER JOIN [PARTNERS] ON ([A_T_PARTNERS].[PARTNER_ID] = [A_T_PROJECTS].[TRADING_PARTNER_ID])

WHERE
    -- JOIN CLAUSES --
    [A_T_PROJECTS].[CUSTOMER_ID] = [A_T_MILESTONES].[PROJECT_NAME_ID]
    AND [A_T_CUSTOMERS].[CUSTOMER_ID] = [A_T_MILESTONES].[CUSTOMER_MILESTONE_NAME_ID]
    AND [A_T_PARTNERS].[PARTNER_ID] = [A_T_PROJECTS].[TRADING_PARTNER_ID]
    AND [A_T_EMPLOYEES].[EMPLOYEE_ID] = [A_T_MILESTONES].[ASSIGNED_TO_ID]
    AND [A_T_STATUS].[LIST_ID] = [A_T_MILESTONES].[STATUS_ID]
    AND [A_T_ACTIONREQ].[LIST_ID] = [A_T_MILESTONES].[ACTION_REQUIRED_BY_ID]

    -- FILTER CLAUSES --
    AND [A_T_CUSTOMERS].[CUSTOMER_SINCE] > '2011-12-10 00:00:00'
    AND ([A_T_MILESTONES].[STATUS_ID] = 1
            OR [A_T_MILESTONES].[STATUS_ID] = 2
            OR [A_T_MILESTONES].[STATUS_ID] = 3
            OR [A_T_MILESTONES].[STATUS_ID] = 5)
    AND ([A_T_PROJECTS].[STATUS] = 'Assigned'
            OR [A_T_PROJECTS].[STATUS] = 'Delayed - per Customer'
            OR [A_T_PROJECTS].[STATUS] = 'Delayed - per Internal'
            OR [A_T_PROJECTS].[STATUS] = 'Delayed - per TP/VAN'
            OR [A_T_PROJECTS].[STATUS] = 'In Progress'
            OR [A_T_PROJECTS].[STATUS] = 'Production'
            OR [A_T_PROJECTS].[STATUS] = 'On-Hold')
    AND [A_T_CUSTOMERS].[TRANSLATOR_ID] != 4
    AND [A_T_CUSTOMERS].[IN_PRODUCTION] = 'F'
    AND ([A_T_PROJECTS].[JOB_TYPE_ID] IS NOT NULL
            OR [A_T_PROJECTS].[JOB_TYPE_ID] != 8
            OR [A_T_PROJECTS].[JOB_TYPE_ID] != 11)

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您应该考虑使用每个表中的<代码>连接< /代码>，而不是使用WHERE子句来链接它们。如果两个表都需要包含相同的“Id”，则使用TableA.Id=TableB.Id上的

TableA内部联接TableB

。如果您想要所有TableA记录，即使TableB中缺少一些记录，也可以使用TableA.Id=TableB.Id上的

TableA LEFT JOIN TableB

。表B中任何不匹配的字段将显示为

NULL

您可以嵌套所有的

JOIN

clue。我不确定netsuite如何处理事情，但您可能需要在join子句周围放置

（）

FROM (TableA AS A INNER JOIN TableB AS B ON A.id=B.id)
                  LEFT JOIN TableC AS C ON A.id=C.id

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祝你好运。

我不知道我可以这样分组。每天学习新的东西！我要试一试。非常感谢。