我有两个表。一个是提交给我们的报告表格。另一个是临时表格,其中包含最终应提交给我们的报告记录。我想只显示临时表中与记录表中的记录不匹配的记录(因此仍显示必须提交的报告)。查询显示表之间不匹配的记录
实例数据是:
Reports table:
CREATE TABLE [dbo].[Reports]
(
[ReportID] [int] IDENTITY(1,1) NOT NULL,
[ReportDate] [date] NULL,
[AssessmentID] [int] NOT NULL,
[ReportType] [varchar](50) NULL
);
AssessmentID ReportType ReportID
1 1st Quarterly 27
2 1st Quarterly 30
2 2nd Quarterly 31
2 3rd Quarterly 32
QuarterlyReportsDue table:
CREATE TABLE #QuarterlyReportsDue
(
AssessmentID INT,
InstallationDate DATE,
QuarterlyReportType VARCHAR(50)
);
AssessmentID InstallationDate QuarterlyReportType
1 2009-08-14 1st Quarterly
1 2009-08-14 2nd Quarterly
1 2009-08-14 3rd Quarterly
1 2009-08-14 4th Quarterly
2 2008-05-16 4th Quarterly
2 2008-05-16 3rd Quarterly
2 2008-05-16 2nd Quarterly
2 2008-05-16 1st Quarterly
我已经试过左外连接,但我遇到了问题。请参阅我下面的SQL:
SELECT #QuarterlyReportsDue.InstallationDate, #QuarterlyReportsDue.QuarterlyReportType, Reports.ReportType
FROM #QuarterlyReportsDue
LEFT OUTER JOIN Reports ON #QuarterlyReportsDue.AssessmentID = Reports.AssessmentID
WHERE Reports.ReportType IN ('1st Quarterly', '2nd Quarterly', '3rd Quarterly', '4th Quarterly')
AND Reports.ReportType <> #QuarterlyReportsDue.QuarterlyReportType
ORDER BY #QuarterlyReportsDue.AssessmentID
而且我的结果:
AssessmentID QuarterlyReportType ReportType ReportID
1 2nd Quarterly 1st Quarterly 27
1 3rd Quarterly 1st Quarterly 27
1 4th Quarterly 1st Quarterly 27
2 4th Quarterly 1st Quarterly 30
2 4th Quarterly 2nd Quarterly 31
2 4th Quarterly 3rd Quarterly 32
2 1st Quarterly 2nd Quarterly 31
2 1st Quarterly 3rd Quarterly 32
2 3rd Quarterly 1st Quarterly 30
2 3rd Quarterly 2nd Quarterly 31
2 2nd Quarterly 1st Quarterly 30
2 2nd Quarterly 3rd Quarterly 32
对于评估1它的伟大工程,评估2有很多重复。我怎样才能解决这个问题,只显示理想的结果?
AssessmentID QuarterlyReportType ReportType
1 2nd Quarterly 1st Quarterly
1 3rd Quarterly 1st Quarterly
1 4th Quarterly 1st Quarterly
2 4th Quarterly
也很棒!感谢您的解释。 – 2010-11-30 20:47:49