SQL isNull无法正常工作

Question

I have a sentence similar to this one:

SELECT ISNULL(sum(PARTE.AFECTADO_ENP_ARBOLADO),0) arbolado 
FROM INCENDIO 

And I don't know how to work with IsNull because this is returning some field with null value.

Answer 1

Try like this :

SELECT SUM(ISNULL(PARTE.AFECTADO_ENP_ARBOLADO,0),0) arbolado FROM INCENDIO 

Initially it will IS NULL will look for values and then it will Aggregate those values

Answer 2

请尝试这个

SELECT SUM(ISNULL(PARTE.AFECTADO_ENP_ARBOLADO,0)) as Arbolado FROM INCENDIO