다른 명령
https://medium.com/@benjaminmbrown/real-time-data-visualization-with-d3-crossfilter-and-websockets-in-python-tutorial-dba5255e7f0e Data Mining Using the RDOM Package By Casimir Saternos
https://www.oracle.com/technetwork/articles/datawarehouse/saternos-r-161569.html https://www.r-bloggers.com/r-to-oracle-database-connectivity-use-roracle-for-both-performance-and-scalability/
https://www.r-bloggers.com/connecting-r-to-an-oracle-database/