How to get last messge between two friends in the messge table having id in descending order?

Question

Hi friends help me to solve this problem ," display all last messages of a user from all his/her friends"

My sample message table is

---------------------------------------------------
|  id | msg       | sender |  reciver | friend_id |
---------------------------------------------------
|  1  | Hi        | 1      | 2        | 1         |
|  2  | Hi..      | 2      | 1        | 1         |
|  3  | Hello     | 6      | 1        | 3         |
|  4  | What dong | 1      | 6        | 3         |
---------------------------------------------------

I need only the last message b/w the user and his friends (here consider user id is 1)

I need the result like below , please help me to achive this with mysql

---------------------------------------------------
|  id | msg       | sender |  reciver | friend_id |
---------------------------------------------------
|  4  | What dong | 1      | 6        | 3         |
|  2  | Hi..      | 2      | 1        | 1         |
---------------------------------------------------

The name of this table is message..

Answer 1

select a.id, a.msg, a.sender, a.receiver, a.friend_id
from msg a
left join msg b on (a.friend_id = b.friend_id and a.id < b.id)
where b.id is null
  and (a.sender = 1 or a.receiver = 1)
order by a.id desc;

Can be tested at http://sqlfiddle.com/#!9/35823/10

It uses "groupwise-max" solution with a left join as can be found for instance in mysql manual (last example).

Your schema seems a bit weird keeping sender, receiver and friend_id, but I suppose friend_id is a FK to some friends table where pairs of (1,2) and (1,6) are stored, so it is more of a "friendship_id" ?