NullCount - script function

NullCount() returns the number of NULL values aggregated in the expression, as defined by a group by clause.

Syntax:  

NullCount ( [ distinct ] expr)

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.