Question

I have users table, each user have multiple records. I need to fetch the latest inserted records of each user. How is it possible using MySQL

users table

id      name   value    updated_at

1       abc    123      2011-02-03
2       xyz    qwe      2011-04-03
3       abc    asd      2011-08-08
4       xyz    poi      2011-08-07

My output should be

id      name   value    updated_at

3       abc    asd      2011-08-08
4       xyz    poi      2011-08-07

I used Queries like

 select id,name,value,updated_at  from users group by name having max(updated_at)

 select id,ep_name,position,max(updated_at)  from test1 group by ep_name having max(updated_at)

But I was not able to get the desired result. I get the max(updated_at) value but not able to get the matching row. Please help

Note: Can this be done without using sub-query. Please help

Thanks in advance

Answer 1

SELECT
  users.id,users.name, users.`value`, users.`updated_at`
FROM
  users
INNER JOIN
(
 SELECT name, MAX(updated_at) AS `updated_at`
 FROM
  users
 GROUP BY
  name
) max_users
ON
  users.name = max_users.name
AND
  users.updated_at = max_users.updated_at

Dan thanks a lot… 🙂 small change in group by to match my output