NullCount() returns the number of NULL values aggregated in the expression, as defined by a group by clause.
Syntax:
Return data type: integer
Arguments:
| Argument | Description |
|---|---|
| expr | The expression or field containing the data to be measured. |
| distinct | If the word distinct occurs before the expression, all duplicates are disregarded. |
Examples and results:
Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in our document to see the result.
| Example | Result |
|---|---|
|
Set NULLINTERPRET = NULL; Temp: LOAD * inline [ Customer|Product|OrderNumber|UnitSales|CustomerID Astrida|AA|1|10|1 Astrida|AA|7|18|1 Astrida|BB|4|9|1 Astrida|CC|6|2|1 Betacab|AA|5|4|2 Betacab|BB|2|5|2 Betacab|DD||| Canutility|AA|3|8| Canutility|CC|NULL|| ] (delimiter is '|'); Set NULLINTERPRET=; NullCount1: LOAD Customer,NullCount(OrderNumber) as NullOrdersByCustomer Resident Temp Group By Customer;
LOAD NullCount(OrderNumber) as TotalNullCount Resident Temp; |
Customer NullOrdersByCustomer Astrida 0 Betacab 0 Canutility 1
The second statement gives: TotalNullCount 1 in a table with that dimension, because only one record contains a null value. |
