title: External Tables vs SQLLoader
body: <p>So, I often have to load data into holding tables to run some data validation checks and then return the results.
  Normally, I create the holding table, then a sqlldr control file and load the data into the table, then I run my queries.
  Is there any reason I should be using external tables for thing instead?
  In what way will they make my life easier?</p>