在使用SELECT SUM（）GROUP BY时，如何仍能获得各个值？

Question

values = 2,3,4

When doing a JOIN (SELECT *, SUM(values) AS MaxValues FROM table GROUP BY id) , $a = $data['MaxValues'] will equal 9 as it should. However, how can I still pull the individual values(2,3,4)? trying a foreach on $b = $data['values'] only gives me one of the values. I'm assuming because of the required GROUP BY . I'm still new to all of this. Thank you

Answer 1

You can select both values and SUM with JOIN . Also, you don't need GROUP BY if you want to get all the values, eg:

SELECT value, a.sum
FROM table, (SELECT SUM(value) AS `sum` FROM table ) a;

Answer 2

You are looking for group_concat() , I think:

JOIN (SELECT id, SUM(values) AS MaxValues, group_concat(values) as values
      FROM table
      GROUP BY id)

Note: You should not be using SELECT * with GROUP BY . Only include the columns in the GROUP BY clause.