Creating a new field in a table based on if condition but doesn't appear

[Nourrahmcnean]

Hello everyone, I added a field as it's shown in the code bellow

Noconcatenate
Tab2:
Load 
date,Service, Volume_Réel_GO, Volume_Réel_GO_2G,Volume_Réel_GO_3G,Volume_Réel_GO_4G,
if(Volume_Réel_GO<=10                                  ,1,                                          
     if(Volume_Réel_GO>10  and Volume_Réel_GO<=50  ,2,
     if(Volume_Réel_GO>50 and Volume_Réel_GO<=100,3,4) AS ID_Palier_reel_Data
Resident tab;

But I get this result 

[rubenmarin1]

Hi, that extra commas might be messing with the syntax, try to set field names between []:

if([Volume_Réel_GO,]<=10 ,1,                                          
     if([Volume_Réel_GO,]>10  and [Volume_Réel_GO,]<=50  ,2,
     if([Volume_Réel_GO,]>50 and [Volume_Réel_GO,]<=100,3,4)