R help - Feb 2009 - Saving data to a MS Access Database

I have the following dataframe:

 

            ad <- data.frame(dates, av, sn$SectorName)

            colnames(ad) <- c("Date", "Value",
"Tag")

 

which has data (rows 10 to 20, for example) as follows:

 

         Date        Value                   Tag

10 2008-01-16    -0.20875            ConDisc

11 2008-01-17    -0.21125            ConDisc

12 2008-01-18    -0.08875            ConDisc

13 2008-01-21    -0.10875            ConDisc

14 2008-01-22    0.02125             ConDisc

15 2008-01-23    0.09500             ConDisc

16 2008-01-24    0.02500             ConDisc

17 2008-01-25    0.03500             ConDisc

18 2008-01-28    0.06625             ConDisc

19 2008-01-29    0.20500             ConDisc

20 2008-01-30    0.11625             ConDisc

 

I want to import this data in into an existing MS Access database which has
the following properties:

 

Name: tblAD

ID: Autonumber, primary key

Date: Date

Value: Double

Tag: String

 

I am trying this by using the following:

 

            result <- sqlUpdate(channel, ad, "tblAD")

 

But I get the following error:
> result <- sqlUpdate(channel, ad, "tblAD")
Error in sqlUpdate(channel, ad, "tblAD") :

                        cannot update 'tblAD' without unique column

 

 

Can anyone suggest where I am going wrong?

 


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