Message-ID: <CAJ55+dLkPFkOiNf99pQWxKNLLZycz561G8U32eKUK7DWcMg=0w@mail.gmail.com>
Date: 2012-09-13T21:07:38Z
From: Thomas Lumley
Subject: Paasing values to sqlQuery like SAS macro
In-Reply-To: <1347551646827-4643033.post@n4.nabble.com>
On Fri, Sep 14, 2012 at 3:54 AM, ramoss <ramine.mossadegh at finra.org> wrote:
> We lost our SAS licence & I am busy transfering my old SAS programs to R
> environment. I am very new to R. In 1 program I was creating SAS macro
> vars & passing them into a SQL query to run against the server. There are 3
> variables firm, begindt, enddt. # of values for each varies month to month.
> Is there anyway I could do the same thing in R & pass the afore mentioned
> values to a query running within sqlQuery?
Almost certainly, but you may have to provide more detail about what
you want (and it's a good idea to mention what package sqlQuery is in,
when asking a question like this)
One approach, based on a guess about what you want, is to take each
value in turn and use gsub() or paste() to put them into a query
string. For example
queries<-paste("select x, y, z, firm, date from the_appropriate_table
where firm=", firms," and date>=", begindts, " and date <=", enddts)
lapply(queries, sqlQuery, channel=my.database.connection)
will return a list of data frames, one for each set of values.
-thomas
--
Thomas Lumley
Professor of Biostatistics
University of Auckland