Maximizing Your ETL Tool Investment : "Is your
organization struggling to justify an ETL (extract, transform
and load) tool purchase? If the tool is an enterprise level
solution, the entry price is likely well into the six digits. At
this price, the justification process may appear daunting.
Because these tools serve a purpose and are critical to serious
data warehouse endeavors, the justification is well worth the
effort ... Since Oracle (substitute any database) exists in
house, writing stored procedures in PL/SQL is often the first
thought for ETL development. With no additional licensing and
existing in-house talent, the decision appears obvious. Less
obvious is the lack of integration, lack of usable meta data and
additional maintenance cost."A useful article to bookmark
if you're ever going to need to justify an ETL tool investment.
See also
"A Business Introduction To Oracle Warehouse Builder" which
is Oracle's own take on this.