These action codes are effectively mathematical, logical or assignment operators.
Such operators are:
- != (inequality)
- & (query logical AND join)
- &= (logical AND assignment)
- * (multiplication)
- + (addition)
- + (concatenation)
- - (subtraction)
- / (division)
- < (less than)
- <= (less than or equal to)
- = (assignment)
- == (equality)
- > (greater than)
- >= (greater than or equal to)
- | (query logical OR join)
- |= (logical OR assigment)