The sqldf() function is typically passed a single argument which is an SQL select statement where the table names are ordinary R data frame names. sqldf() transparently sets up a database, imports the data frames into that database, performs the SQL select or other statement and returns the result using a heuristic to determine which class to assign to each column of the returned data frame. The sqldf() or read.csv.sql() functions can also be used to read filtered files into R even if the original files are larger than R itself can handle. 'RSQLite', 'RH2', 'RMySQL' and 'RPostgreSQL' backends are supported.
|Author||G. Grothendieck <[email protected]>|
|Date of publication||2017-06-28 06:43:10 UTC|
|Maintainer||G. Grothendieck <[email protected]>|
|Package repository||View on CRAN|
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