How to connect to SQL Server with R? - sql-server

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.