See how to join two data sets by one or more common columns using base R’s merge function, dplyr join functions, and the speedy data.table package. R has a number of quick, elegant ways to join ...

The file, "c:\files\december_sales.csv," contains CSV data you wish to import. The table, "in_sales," is a database table formatted with the same number and types of fields as the CSV file.

You can use a CSV file to move data between programs that aren't ordinarily able to exchange data. If you spend any time with spreadsheet applications like Microsoft Excel or Google Sheets — or ...