Ralph Kimball On The 38 Subsystems Of ETL
Monday, January 31st, 2005 by Mark Rittman
Ralph Kimball, "The 38 Subsystems Of ETL" : "The extract-transform-load (ETL) system, or more informally, the "back room," is often estimated to consume 70 percent of the time and effort of building a data warehouse. But there hasn’t been enough careful thinking about just why the ETL system is so complex and resource intensive. Everyone [...]

