Question How to get unique records

[nratnayaka@]

I am trying to build a query using two tables. One is a table called sanctuary lakes cleaning data. The other one is called Faulire data. In cleaining table there are four years of cleaning records for each pit. I want to find the performance of these cleaned pits using failure table. Each failure date should have only one correspoding cleaning date. I wrote the following query. This query works. But it gives duplicate data. Some of the records will show two cleaning dates for a failure.

My query is like this.

SELECT DISTINCTROW [Sanctuary Lakes cleaning data].PIT, [Sanctuary Lakes cleaning data].[Cleaned Year], [Sanctuary Lakes cleaning data].[Cleaning Date], [Sanctuary Lakes cleaning data].[SR NO], [Failure data table].[Failure Year], Min([Failure data table].Failure_date) AS MinOfFailure_date, [Failure data table].[Failure SR no]
FROM [Failure data table] LEFT JOIN [Sanctuary Lakes cleaning data] ON [Failure data table].Pit = [Sanctuary Lakes cleaning data].PIT
GROUP BY [Sanctuary Lakes cleaning data].PIT, [Sanctuary Lakes cleaning data].[Cleaned Year], [Sanctuary Lakes cleaning data].[Cleaning Date], [Sanctuary Lakes cleaning data].[SR NO], [Failure data table].[Failure Year], [Failure data table].[Failure SR no]
HAVING (((Min([Failure data table].Failure_date))>Min([Sanctuary Lakes cleaning data]![Cleaning Date])))
ORDER BY [Sanctuary Lakes cleaning data].PIT;

My results are as follows:
PIT Cleaned Year Cleaning Date SR NO Failure Year Failure_date Failure SR no
1-08 2007/08 16-Oct-07 213458 2011/12 13-Aug-11 414984
1-08 2007/08 16-Oct-07 213458 2011/12 25-Jun-12 478589
1-08 2009/10 19-May-10 313497 2011/12 13-Aug-11 414984
1-08 2009/10 19-May-10 313497 2011/12 25-Jun-12 478589
1-08 2010/11 22-Feb-11 379081 2011/12 13-Aug-11 414984
1-08 2010/11 22-Feb-11 379081 2011/12 25-Jun-12 478589
1-08 2011/12 17-Apr-12 458430 2011/12 25-Jun-12 478589

I want the following results.

PIT Cleaned Year Cleaning Date SR NO Failure Year Failure_date Failure SR no
1-08 2010/11 22-Feb-11 379081 2011/12 13-Aug-11 414984
1-08 2011/12 17-Apr-12 458430 2011/12 25-Jun-12 478589

How can I modify my query?

Please help.

thanks

Nish

 

[llkhoutx]

Your HAVING criteria is obviously the culprit. From your data, I cannot discern your result.

 

[PaulO]

If you are looking for just the LATEST record for each failure (?) then you need to add the SUM functionality to the Query and on the FailureDate field select the Max total property