You can use the following comparison operators in range table expressions:
< > <= >= /= otherwise
When the first element in the range expression is "otherwise", the second element must be the empty string (""). For example: ("otherwise" "" "red"). Although you do not specify a comparison value when you use the otherwise operator, a second list element is still required.
Note The not-equal operator, represented here by "/=", is represented by "<>" in other Data Extension functions.