ETLUtils: Utility Functions to Execute Standard Extract/Transform/Load
Operations (using Package 'ff') on Large Data
Provides functions to facilitate the use of the 'ff' package
in interaction with big data in 'SQL' databases (e.g. in 'Oracle', 'MySQL',
'PostgreSQL', 'Hive') by allowing easy importing directly into 'ffdf' objects
using 'DBI', 'RODBC' and 'RJDBC'. Also contains some basic utility functions to
do fast left outer join merging based on 'match', factorisation of data and a
basic function for re-coding vectors.
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