[R] Querying RData Files, SQL style?

[Dennis Murphy]

My understanding is that sqldf works in conjunction with the sqlite
and H2 DBMSs. You should be able to verify that from the sqldf home
page; if I'm wrong, Gabor will quickly correct me :)

Dennis

On Fri, Jul 15, 2011 at 11:51 AM, Bhushan, Vipul
<vipul.bhushan at geodecapital.com> wrote:
> Thanks very much for your response. This sqldf package looks promising. I just need to figure out if a dbms needs to be running/installed in our environment (to hold the temporary SQLite DB it creates). The examples in the documentation are helpful too.
>
> -----Original Message-----
> From: Dennis Murphy [mailto:djmuser at gmail.com]
> Sent: Friday, July 15, 2011 2:10 PM
> To: Bhushan, Vipul
> Cc: r-help at r-project.org
> Subject: Re: [R] Querying RData Files, SQL style?
>
> Hi:
>
> If you load the data into R, there is a package called sqldf that
> allows one to apply SQL syntax to an R data frame. Is that what you
> had in mind? If so, Google 'sqldf R' and you should get a pointer to
> its home page.
>
> HTH,
> Dennis
>
> On Fri, Jul 15, 2011 at 7:29 AM, Bhushan, Vipul
> <vipul.bhushan at geodecapital.com> wrote:
>> Hello. Is there a package or functionality available somewhere which will allow for complex searches (such as what SQL can do) of collections of RData files? Search capability within a given RData file at a time (which could be put in a loop) would be good, but the capability to perform joins to data across multiple RData files would be great. These queries might be ad-hoc, so writing an R program to get(load(...)) each file and customize the search in home-grown R code isn't feasible.
>>
>> This shouldn't be dependent on environment details, but just in case: I'm running version 2.13.0 in a Unix environment (but could easily run in Windows too).
>>
>> Thanks very much.
>>
>>
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>