"." separated field identifier
Option(left hand side value), None if null
Option(right hand side value), None if null
delta of numerical values
delta of numerical values
"." separated field identifier
Option(left hand side value), None if null
Option(right hand side value), None if null
Delta of a single field between two records.
"." separated field identifier
Option(left hand side value), None if null
Option(right hand side value), None if null
delta of numerical values