| selectExpr,DataFrame,character-method {SparkR} | R Documentation |
Select from a DataFrame using a set of SQL expressions.
## S4 method for signature 'DataFrame,character' selectExpr(x, expr, ...)
x |
A DataFrame to be selected from. |
expr |
A string containing a SQL expression |
... |
Additional expressions |
A DataFrame
## Not run:
##D sc <- sparkR.init()
##D sqlContext <- sparkRSQL.init(sc)
##D path <- "path/to/file.json"
##D df <- jsonFile(sqlContext, path)
##D selectExpr(df, "col1", "(col2 * 5) as newCol")
## End(Not run)