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 understands the three letters: […]
