SQL select values sum same ID

Question

This is my Table called "SAM"

ID  |   S_Date   |  S_MK |   TID   |   Value   |
===============================================
1   | 2012-12-11 |   1            


        

Answer 1

SELECT *, SUM(Value) AS Value From SAM GROUP BY TID

This will return the same table by summing up the Value column of the same TID column.