NULL, empty string and values
From LimeSurvey Manual
Details on the difference between NULL, empty string and values in the database response table.
TODO
DECIMAL and DATE cannot be "empty string".
TODO: Exclusive option
TODO: Slider
Details on the difference between NULL, empty string and values in the database response table.
TODO
DECIMAL and DATE cannot be "empty string".
TODO: Exclusive option
TODO: Slider