Do you know the RSQLite package? It uses the DBI package which gives a common interface to various DB engines. With it, you can explicitely treat data.frames as tables, and execute SQL querys on them.
Antonio, Fabio Di Narzo. 2006/5/5, Robert Citek <[EMAIL PROTECTED]>: > > > Is there a cheat-sheet anywhere that describes how to do SQL-like > manipulations on a data frame? > > My knowledge of R is rather limited. But from my experience it seems > as though one can think of data frames as being similar to tables in > a database: there are rows, columns, and values. Also, one can > perform similar manipulations on a data frame as one can on a table. > For example: > > select * from foo where bar < 10 ; > > is similar to > > foo[foo["bar"] < 10,] > > I'm just wondering how many other SQL-like manipulations can be done > on a data frame? As an extreme example, is it reasonable to assume > there is an R equivalent to: > > select bar, bat, baz, baz*100 as 'pctbaz' from foo where bar like %xyz > % order by bat, baz desc ; > > Regards, > - Robert > http://www.cwelug.org/downloads > Help others get OpenSource software. Distribute FLOSS > for Windows, Linux, *BSD, and MacOS X with BitTorrent > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
