rodbc

I am new to R but am interested in using Shiny to create dynamic charts using data stored in a SQL Server database. To enable interactivity, I want to bring in the raw data from the database and perform calculations within R rather than have the database summarize the data. I am able to connect to the database using RODBC , execute a query, and receive results in a data.frame . However, the read time in R is about 12x longer than than the same query executed in SQL Server Management Studio (SSMS). SSMS takes ~600 ms, whereas R takes about 7.6 seconds. My question is whether I am doing

I have come across similar posts, but my issue looks different. I haven't been able to fix the results to these queries with "rows_at_time=1" or "believeNRows = False". I am trying to connect to an Oracle database using RODBC within R. I am able to connect to the database, but I am not retrieving any data, except the column headings. For example I will have zero observations on 18 variables from one table. I do this at work on my PC all the time, but am trying to do this on my macbook pro at home. Below is the connection code db<-odbcConnect(dsn="DW", uid="XXXXXX", pwd="XXXXX", rows_at_time =

I have the following dataframe which contains the AxiomaID. x<-c(0123, 234, 2348, 345, 3454) And trying to run the following SQL Query within R. SQL6<-data.frame(sqlQuery(myConn, "SELECT top 10 [AxiomaDate] ,[RiskModelID] ,[AxiomaID] ,[Factor1] FROM [PortfolioAnalytics].[Data_Axioma].[SecurityExposures] Where AxiomaID = x")) How can I paste all the x values which contain the AxiomaID's into the SQL Query? Try the following query: SQL6<-data.frame(sqlQuery(myConn, paste("SELECT top 10 [AxiomaDate] ,[RiskModelID] ,[AxiomaID] ,[Factor1] FROM [PortfolioAnalytics].[Data_Axioma].[SecurityExposures]

I'm using RODBC package to connect to Oracle databases from R but I didn't succeed in merging tables from different databases without "downloading" the tables (I don't want to download them as they are too big!). I'd like to use something like: DBa=odbcConnect(dsn="DatabaseA",uid="uid",pwd="pwd",readOnly="True") DBb=odbcConnect(dsn="DatabaseB",uid="uid",pwd="pwd",readOnly="True") sqldf("select a.year, sum(b.var) as sumVar from sqlFetch(DBa,'tableA') a sqlFetch(DBb,'tableB') b where a.ID=b.ID group by a.year") If someone has an idea, it would be really helpful! Many thanks in advance. Lionel

I need help to write a simple data row to SQL server from R Language. (using RODBC or otherwise). You can write all the data (all rows) using sqlSave(channel, data, rownames = FALSE) where channel <- odbcDriverConnect("Driver={SQL Server};Server=AAA;Uid=BBB;Pwd=CCC;") . This will create a table with a name data in your database. You can then append your existing table by sqlQuery(channel, 'insert into table select * from data') . 来源： https://stackoverflow.com/questions/34591444/how-to-insert-data-to-sql-server-table-using-r