title: how to transfer business rules to new data base in 3-tire Architecture?
body: <p>as we know that 3-tire Architecture consist of Presentation tier , business logic and data base tier
  the business rules (like : stored procedures , triggers ...) are stored in data base tier , 
  so when we want to replace the data base engine (like ms sqlserver) with new db engine (like oracle) these rules must be transfer to 
  new db engine . </p>
  
  <p>my question is how we can transfer these rules automatically instead of rewrite them for new engine?</p>