Export data frame to SQL server using RODBC package

问题

I am using RODBC package in R to import / export data frames from SQL Server database. While there is no problem in importing. I dont know how to export the contents of a data frame into an existing SQL table.

I am trying to use sqlQuery() function available in the package, but I am not sure how to insert multiple records in the table.

A sample on how to insert the rows will be helpful I have ensured that columns of my table and data frame are same.

回答1:

Use sqlSave with append property. See my code below:

 sqlSave(uploaddbconnection, outputframe, tablename =
    "your_TableName",rownames=FALSE, append = TRUE)

回答2:

This is my code on using sqlSave(). I am using SQL Server 2008. Conn is a connection that I created using odbcConnect():

#creating data to be saved in SQL Table
data_to_save<-cbind(scenario_1,scenario_2,scenario_3,scenario_4,store_num,future_date,Province,index)

#use sqlSave() rather than sqlQuery() for saving data into SQL Server
sqlSave(conn,data.frame(data_to_save),"CC_Forecast",safer=FALSE,append=TRUE)

回答3:

dbWriteTable(conn, "RESULTS", results2000, append = T)

use DBI package

回答4:

I would like to add upon Yan's answer.

Before you use sqlSave() function, make sure you change your default database to the right database where your table are. Especially if you want to write to an existing table!

See here: for how to set up ODBC connection and how to change default database.

After that, you can use these to dump data to sql:

specificDB= odbcConnect(dsn ='name you set up in ODBC',uid = '***', pwd = '****')

sqlSave(specificDB, output_to_sql, tablename = 'a_table_in_specificDB', rownames = F,append = T)

close(specificDB)

It is slow. be patient.

来源：https://stackoverflow.com/questions/21302514/export-data-frame-to-sql-server-using-rodbc-package

标签

sql

sql-server

rodbc