SQL | get query from 2 table with condition - codeigniter

Question

I have 2 tables, I want to display all user in list in my web, and show his last login details from table tbl_login_details but get the last login details for this user
1- diplay all my user from table - tbl_user
2- display LAST login for all user so the data of tbl_login_details must be ORDER then take THE LIMT
---------tbl_user-------
id user_id user_name
1 5 mohammed
2 7 ahmed
-------------tbl_login_details----------
id user_id last_activity
1 7 2016-5-2
2 7 2017-4-2
3 7 20-17-8-4
My Work is
$this->db->select('m.*,u.*');
$this->db->from('tbl_user m');
//$this->db->where("m.user_id", $id);
$this->db->join('tbl_login_details u ', 'u.user_id = m.user_id');
$where = 'm.user_id = u.user_id OR u.user_id = m.user_id OR m.user_id=" " ORDER last_activity';
$where = $this->db->order_by("last_activity", "desc");
$this->db->where($where);
// $this->db->limit('1');
$this->db->group_by('m.user_id');// add group_by
$query = $this->db->get();
return $query->result();

Answer 1

use max aggregation to find the last activity:
select userid, max(last_activity)
from tbl_user a inner join tbl_login_details b on a.userid=b.userid

Answer 2

are you try to get the last detail login from each user, If yes you can using ORDER DESC AND LIMIT 1
create query for display tbl_user first
SELECT * FROM tbl_user ORDER BY id ASC
then you can create query for get last user login
SELECT * FROM tbl_login_details WHERE user_id = 7 ORDER BY id DESC LIMIT 1
you can using modal pop up for display detail login.
or are you try display like this ?
id user_id user_name last_activity
1 5 mohammed 20-17-8-4
2 7 ahmed 20-17-8-4

Answer 3

help into CI max aggregation to find the last activity:
$query = $this->db->query("select userid, max(last_activity) from tbl_user a inner join tbl_login_details b on a.userid=b.userid");
foreach ($query->result() as $row)
{
echo $row->title;
echo $row->name;
echo $row->body;
}

Answer 4

Here is the simple SQL code to fetch that. You can do it CodeIgniter's way:
Implement this SQL into CodeIgniter.
SELECT tbl_user.user_id, tbl_user.user_name, tbl_login_details.user_id, tbl_login_details.last_activity FROM tbl_user, tbl_login_details WHERE tbl_user.user_id = tbl_login_details.user_id ORDER BY tbl_login_details.last_activity DESC

Answer 5

May be you are searching for Following
SELECT user_id, user_name, (SELECT last_activity FROM tbl_login_details WHERE tbl_login_details.user_id = tbl_user.user_id ORDER BY last_activity DESC LIMIT 1) as last_activity FROM tbl_user
updated code. search for how to write this sub query in active record. or just use custom query like $query = $this->db->query("YOUR QUERY");

Answer 6

Hope this can help you
SELECT u.id,u.user_id,u.user_name,MAX(l.last_activity) AS last_activity
FROM tbl_user u
LEFT JOIN tbl_login_details l ON(u.user_id=l.user_id)
GROUP BY u.user_id
on codeigniter custom query builder
$query = $this->db->query("SELECT u.id,u.user_id,u.user_name,MAX(l.last_activity) AS last_activity FROM tbl_user u LEFT JOIN tbl_login_details l ON(u.user_id=l.user_id) GROUP BY u.user_id");
foreach ($query->result() as $row)
{
echo $row->id;
echo $row->user_id;
echo $row->user_name;
echo $row->last_activity ;
}