MySQL SELECT function to sum current data

Question

I have a query that return something like this:

| ID | Val |  
| 0  | 10  |     
| 1  | 20  |     
| 2  | 30  |  

But instead of that, I wa

Answer 1

Would something like this work for your purposes? (Warning, potentially really darned slow with the subselect).

SELECT t1.id, t1.val, (SELECT SUM(val) FROM table AS t2 WHERE t2.id <= t1.id) 'sum'
   FROM table AS t1
   ORDER BY id ASC