I'm a beginner in Talend Open Studio, and I'm trying to do the transformation below.

From a SQL Table that contains:

```
DeltaStock          Date 
------------------------
+50 (initial stock) J0    
+80                 J1    
-30                 J2
...                 ...

```

I want to produce this table:

```
Stock  Date
-----------
50     J0             
130    J1
100    J2 
...    ...

```

Do you think this could be possible using TOS? I thought of using tAggregateRow, but I didn't find it appropriate to my issue.