11 lines
668 B
Plaintext
11 lines
668 B
Plaintext
The sqldf() function is typically passed a single argument which is an SQL
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select statement where the table names are ordinary R data frame names. sqldf()
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transparently sets up a database, imports the data frames into that database,
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performs the SQL select or other statement and returns the result using a
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heuristic to determine which class to assign to each column of the returned
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data frame. The sqldf() or read.csv.sql() functions can also be used to read
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filtered files into R even if the original files are larger than R itself can
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handle. 'RSQLite', 'RH2', 'RMySQL' and 'RPostgreSQL' backends are supported.
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WWW: https://cran.r-project.org/web/packages/sqldf/
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