title: db2 ? lookup error db2 error code
body: <p>I don’t know which is the shortest way to look at the error descriptions like “ERRORCODE=-4463, SQLSTATE=42601”
  Generally I google such kind of error descriptions and I can get the result somewhat anyways.
  But this turns out to be very inefficient, sometimes it is just difficult to get description regarding the error code and sql state.
  I know the db2 built in command like : db2 ? SQL0443N  will provide information about specific  SQLCODE
  But when encountered error description like that above , how do I turn that into a SQLCODE, so that I can lookup it quickly using db2 ?</p>