How to connect to SQL Server with R?

Question

I want to create a model in R using a connection to data stored in SQL Server datawarehouse. I tried to use RevoScaleR library which returned

package RevoScaleR is not available (for R version 3.4.1)

so, I edited the connection string (given on the code below) for ODBC library:

install.packages("RevoScaleR")
#require("RevoScaleR")

if (!require("RODBC"))
    install.packages("RODBC")

conn <- odbcDriverConnect(connection="Driver={SQL Server Native Client 11.0}; Server=CZPHADDWH01/DEV; Database=DWH_Staging; trusted_connection=true")

sqlWait <- TRUE;
sqlConsoleOutput <- FALSE;
cc <- RxInSqlServer(connectionString = conn, wait = sqlWait)
rxSetComputeContext(cc)

train_query <- "SELECT TOP(10000) * FROM dim.Contract"
formula <- as.formula("Cosi ~ ContractID + ApprovedLoanAmount + ApprovedLoadDuration")
forest_model <- rxDForest(formula = formula,
                            data = train_query,
                            nTree = 20,
                            maxDepth = 32,
                            mTry = 3,
                            seed = 5,
                            verbose = 1,
                            reportProgress = 1)
rxDForest_model <- as.raw(serialize(forest_model, connection = conn))

lenght(rxDForest_model)

However:

package 'RODBC' successfully unpacked and MD5 sums checked

The downloaded binary packages are in C:\\Users\\sjirak\\AppData\\Local\\Temp\\Rtmpqa9iKN\\downloaded_packages Error in odbcDriverConnect(connection = "Driver={SQL Server Native Client 11.0}; Server=CZPHADDWH01/DEV; Database=DWH_Staging; trusted_connection=true") : could not find function "odbcDriverConnect" In library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, : there is no package called 'RODBC' Any help would be appreciated.

Answer 1

Looking at the documentation of the ODBC, I see the following functions

odbc-package 
dbConnect,OdbcDriver-method 
dbUnQuoteIdentifier 
odbc 
odbc-tables 
OdbcConnection 
odbcConnectionActions 
odbcConnectionIcon 
odbcDataType 
OdbcDriver 
odbcListColumns 
odbcListDataSources 
odbcListDrivers 
odbcListObjects 
odbcListObjectTypes 
odbcPreviewObject 
OdbcResult 
odbcSetTransactionIsolationLevel 
test_roundtrip

hence I dont see your function in this list. This could be the reason why...

Hence, check the documentation for the proper function.