Availability
UPDATE command
Syntax
$wbnull$
Description
Since WBSP engine ignores empty WBF_tablefieldname form fields, it is not
possible to delete content of non-numeric field by sending empty string as a
WBF_ field value. Therefore WBSP uses $WBNULL$ as a value for WBF_ form field(s)
to define which database table fields in current (updated) record should be set
to empty string. It does not apply to the numeric fields (to clear them set
their value to 0).
Here's an example: