| Excerpt | ||
|---|---|---|
| ||
ifNull(expression, nullReturnValue) Returns a value depending on whether a supplied expression is _NULL. |
Function: ifNull()
Acts The ifNull function acts as a simple IF statement to determine what to do when the supplied expression supplied to it is _NULL or not. Specifically it It checks the value returned by the first expression provided, if this is . If the returned value is:
- _NULL, the second expression
...
- runs
- not _NULL, the value in the initial expression is used.
You can provide an optional third expression will to run . If the third statement is blank the expression will do nothing and continueif the first expression is not blank, instead of simply returning the non-null value.
Syntax
- ifNull(expression, nullReturnValue)
- ifNull(expression, nullReturnValue, notNullReturnValue)
| Argument | Type | Description |
|---|---|---|
| expression | Any | The expression to be evaluated and checked. If notNullReturnValue is not provided, then this is also used as the return value for the function if expression does not evaluate to _NULL. |
| nullReturnValue | Any | The value to be returned if expression is _NULL |
| notNullReturnValue | Any | An optional parameter containing the value to be returned if expression does not evaluate to _NULL. |
...