title: Where to find novice BAPI coding guides?
body: <p>I've been working with applications interfacing with SAP via a web service for a little while now and I want to get into programming the BAPI's behind the web services as well. My company has been using a SAP consultant for the BAPI programming and I'd like to move into filling that role also.</p>
  
  <p>I have a decent amount of experience with the core functionalities of SAP as an end user, so I'm not completely new there. But I've never done any BAPI programming before and I've had a hard time finding good beginner guides. I'd like to find something for experienced programmers that takes you from the SAP equivalent of "hello world" to writing business critical BAPIs.</p>
  
  <p>I've heard that BAPI coding is similar to coding in SQL, is that true?</p>
  
  <p>Also, I'd like to find a free online guide, but I realize that might be wishful thinking so any comprehensive books would also be helpful.</p>