Paasing values to sqlQuery like SAS macro

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

Thanks I was doing something similar in SAS.  I was looping macro based on a
dataset containing the values:
data  _null_;
  set summary2;
   mindat=put(datepart(mindate),date9.);
   min_date='mindat_'|| trim(left(_n_));
   put mindate= mindat= min_date=; /*check values in log*/
   call symput (min_date,compress("'"||mindat||"'"));
   maxdat=put(datepart(maxdate),date9.);
   max_date='maxdat_'|| trim(left(_n_));
   call symput (max_date,compress("'"||maxdat||"'"));
  var_name='firm_' || trim(left(_n_));
  put var_name= firm=;
  call symput (var_name,compress("'"||firm||"'"));
  call symput ('total_obs',_n_);
run;
       /* To test macro vars*/
%macro affiliated;
 %do i=1 %to &total_obs;
%put firm_i=&&firm_&i;
%put mindat=&&mindat_&i;
%put maxdat=&&maxdat_&i;
%end;
%mend;               
%affiliated;
    /* END*/


So you are saying in R I can use the functions that you mention to subtract
the info from dataframe containing all the values & pass it on?   I am using
the sqldf package.





 I am using sqldf package. 



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