UPDATE with SUM() in MySQL

Question

My table:

ID  NAME COST  PAR  P_val  S_val
1   X    5     0    1      0
1   y    5     0    2      0
1   z    5     0    0      5
2   XY   4     0    4      4
         


        

Answer 1

UPDATE Table_Name SET PAR = (SELECT SUM(S_val) FROM Table_Name WHERE ID=1) 
FROM   Table_Name

Check writing. delete "FROM Table_Name" row.

TRUE command is:

UPDATE Table_Name SET PAR = (SELECT SUM(S_val) FROM Table_Name WHERE ID=1)