RaceMate MCL provides support for null values. This support simplifies the task of representing unknown data. Null values are:
• | Equal to the absence of any value. |
• | Different than zero, the empty string (""), or blank. |
• | Sorted ahead of other data. |
• | Propagated in calculations and most functions. |
A null value is displayed as .NULL. When you double-clicking on a cell of null value in a RaceMate view, RaceMate will display a box showing information, if available, about how the value is got.
Page url: http://www.racematenet.com/english/help/index.html?characteristics_of_null_values.htm