how to update many rows at same time using my sql

Question

I got one table called family , which contains a column called power . I want to update maximum ten values of power by adding one in each row and the rest remains the same. I try my own method by creating another table which contains the maximum ten values that I want to update and create a query below, but got some problems. Here's the query:

UPDATE family
  SET family.total = (SELECT totalmax.total FROM totalmax 
    INNER JOIN  familyone
    ON family.family_id2 = totalmax.family_id2
    WHERE family.family_id2 = totalmax.family_id2)

Can someone tell me where's the problem with this query and is there any other methods to solve my problem?

Answer 1

You could do this with a join

UPDATE  family
INNER JOIN
        totalmax
ON      family.family_id2 = totalmax.family_id2
SET     family.total = totalmax.total