February 6, 2006 at 6:21 am
I had posted a question last week about about a getting rid of duplicates in a select statement that was answered thanks to people on this forum. After working on it I ran into a problem this weekend.
I have the following SQL statment that returns the correct number of rows
select
Distinct CustomerName,CustomerNumber,SalesmanName,Min(ItemDescription) AS ItemDescription,OrigionalDateofService,InsuranceCarrier, Diag1,Diag2,Diag3,Diag4 from O2
Group By
CustomerName,
CustomerNumber,
SalesmanName,
OrigionalDateofService,
InsuranceCarrier,
Diag1,
Diag2,
Diag3,
Diag4
The problem that I run into is that my O2 table also has and ID column, an auto Identity field, that must be included within the result set for development reasons.
When I add the ID to the select statement it returns all the rows of the column. What would be the correct way to include the ID field and get the right set of data.
February 6, 2006 at 7:47 am
Well one thing is you'd have to determine what "id" you want to return. Do you just return one of them for each distinct set you have or ..do you need to return each one ?
Mathew J Kulangara
sqladventures.blogspot.com
February 6, 2006 at 7:50 am
I only need to return the one for the distinct combination.
February 6, 2006 at 7:53 am
If I'm understanding you...
select Distinct [ID],CustomerName,CustomerNumber,SalesmanName,Min(ItemDescription) AS ItemDescription,OrigionalDateofService,InsuranceCarrier, Diag1,Diag2,Diag3,Diag4 from O2
Group By
[ID],
CustomerName,
CustomerNumber,
SalesmanName,
OrigionalDateofService,
InsuranceCarrier,
Diag1,
Diag2,
Diag3,
Diag4
By the way if {id] is trully an identity column ..you shouldn't need distinct at all.
HTH
Mathew J Kulangara
sqladventures.blogspot.com
February 7, 2006 at 9:08 am
Try the following:
select Distinct CustomerName,CustomerNumber,SalesmanName,Min(ItemDescription) AS ItemDescription,OrigionalDateofService,InsuranceCarrier, Diag1,Diag2,Diag3,Diag4,
min(ID) as ID
from O2
Group By
CustomerName,
CustomerNumber,
SalesmanName,
OrigionalDateofService,
InsuranceCarrier,
Diag1,
Diag2,
Diag3,
Diag4
This will still allow you to get only the distinct combinations of your data w/o having the ID field introduce artificial uniqueness.
Have fun!
Steve G.
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