Behavior of Null Values in Commands and Functions
| Visual FoxPro 9.0 SP2 |
| Behavior of Null Values in Commands and Functions |
| See Also |
|
The following table describes how commands and functions interpret null values.
| Data type | Behavior |
|---|---|
|
Most logical expressions that evaluate to .NULL. return .NULL. or generate an error. EMPTY( ), ISBLANK( ), and ISNULL( ) are exceptions. |
|
|
Numeric expressions that evaluate to .NULL. return .NULL. A numeric function evaluates to .NULL. when passed a null value. |
|
|
Date expressions containing null values return .NULL. |
See Also
Microsoft Visual FoxPro 9 SP2 Help file, VFPX Edition v1.08Send feedback on this topic to the VFPX Help file project team.
2009-2017 Placed under Creative Commons licensing by Microsoft Corporation.
Comment or report problem with topic