ordering-functions less than (<)


  1. lt(a, b)
  2. a < b


lt(a, b) or a < b results in a boolean data-item indicating if the values of data item a are less than the corresponding values of data item b.


Each comparison with missing values results in the value False.

applies to

Data items with Numeric, string or bool value-type


  1. Domain of the arguments must match or be void (literals or parameters can be compared to data items of any domain).
  2. Arguments must have matching:


1. attribute<bool> AltB (CDomain) := lt(A, B);
2. attribute<bool> AltB (CDomain) := A < B;
A B AltB
0 0 False
1 2 True
2.5 2.5 False
-100 100 True
999 -999 False
null 0 False
null null False
0 null False
null 100 False
100 null False

CDomain, nr of rows = 10

see also