===== DBNull (Function) =====

==== Format ====
**dbnull** ( [[numericexpressions|numeric_expression]] )\\
**dbnull** ( [[integerexpressions|database_number]] , [[numericexpressions|numeric_expression]] )\\
**dbnull** ( [[integerexpressions|database_number]] , [[integerexpressions|database_recordset_number]] , [[numericexpressions|numeric_expression]] )\\
**dbnull** ( [[stringexpressions|string_expression]] )\\
**dbnull** ( [[integerexpressions|database_number]] , [[stringexpressions|string_expression]] )\\
**dbnull** ( [[integerexpressions|database_number]] , [[integerexpressions|database_recordset_number]] , [[stringexpressions|string_expression]] )\\

returns [[booleanexpressions|boolean_expression]]

==== Description ====
Return a [[booleanexpressions|true]] if the specified column number or name of the current row of the open recordset is a NULL vale.  If the field contains a value a [[booleanexpressions|false]] will be returned.

==== Example ====
See example of usage on [[DBOpen|DBOpen]] page.

==== See Also ====
{{page>en:start#Database (SQLITE)&noheader}}

==== External Links ====
More information about databases in general and SQLite specifically can be found at [[http://sqlite.org|SQLite Home Page]] and [[http://en.wikipedia.org/wiki/SQL|SQL at Wikipedia]].

==== History ==== 
|0.9.9.23|New to Version|