1
下面是我正在使用的表的示例。这些只代表相关的列到我的查询使用别名选择相同的列两次表
_Requirements
RequirementID fkOwningWsID
-------------------------------------------
REQ-RPT-01 1
REQ-RPT-02 2
_Workstream
pk WsNm
-------------------------------------------
1 Workstream1
2 Workstream2
mnWorkstream_Leads
fkWsID fkEeID
-------------------------------------------
1 1
1 2
2 1
2 2
下表是一个联合的结果。员工可以从不同的公司,低于工会列出了所有的员工ID,从公司2(否则为0)
qryTrackerAllEeList
EeID Company1_ID Company2_ID
-------------------------------------------
1 1 0
2 0 2
对谁都是从公司1(否则为0)员工的ID和ID为员工
我试图查看以下结果
RequirementID WsNm Company1_Lead Company2_Lead
--------------------------------------------------------------------
REQ-RPT-01 Workstream1 1 2
REQ-RPT-02 Workstream2 1 2
我已经发布了以下SQL
SELECT DISTINCT Req.RequirementID, Ws.Wsnm, company1_id.ee_id, company2_id.ee_id
FROM (((([_Requirements] AS Req
INNER JOIN [_Workstream] AS Ws ON Req.fkOwningWsID = Ws.pkWsID)
INNER JOIN [mnWorkstream_Leads] AS wsLeads ON Ws.pkWsID = wsLeads.fkWsID)
LEFT OUTER JOIN qryTrackerAllEeList AS company1 ON wsLeads.fkEeID = company1.Company1_ID)
LEFT OUTER JOIN qryTrackerAllEeList AS company2 ON wsLeads.fkEeID = company2.Company2_ID)
的问题,但是,我检索结果如下
RequirementID WsNm Company1_Lead Company2_Lead
--------------------------------------------------------------------
REQ-RPT-01 Workstream1 2
REQ-RPT-01 Workstream1 1
REQ-RPT-02 Workstream2 2
REQ-RPT-02 Workstream2 1
如何消除这些重复行和空值有什么建议?
就像一个魅力! – Ian