title: What is a database closure?
body: <p>I came across this term called database closure. </p>
  
  <p>I tried to look for it and what exactly it means but I have not found any simple explanation. </p>
  
  <p>Can someone please explain what the concept of closure is and specifically what is a database closure, if it is good /bad, how it can be used or avoided ?</p>
  
  <p>Also seems like there is in general a closure term: <a href="http://en.wikipedia.org/wiki/Closure_%28computer_science%29">http://en.wikipedia.org/wiki/Closure_%28computer_science%29</a> which relates to binding of variables to function. Is a database closure related to this ? </p>
  
  <p>Thanks!</p>