Question

I have created a table with the following structure-

$sql = "CREATE TABLE followers
    (
     uid int UNSIGNED NOT NULL UNIQUE,
     PRIMARY KEY(uid),
     follower_count int UNSIGNED ,
     is_my_friend bool,
     status_count int UNSIGNED,
     location varchar(50)
    )";

I need to find the uid of the person with max(status_count+follower_count) and whose is_my_friend = 1

I wrote the following query but I ain’t getting the correct uid.

SELECT p.uid FROM (select uid,is_my_friend,max(follower_count+status_count) from followers) p WHERE p.is_my_friend = 1;

Answer 1

The following query will work:

Select uid
From followers
Where is_my_friend = 1
Order By (follower_count+status_count) desc LIMIT 0,1

Limit 0,1 works in MySql.

Or, if you want to return all rows where follower_count+status_count = max only, this is the query:

Select uid
From followers
Where is_my_friend = 1
  And (follower_count+status_count) = (select max(follower_count+status_count)
                                       from followers
                                       where is_my_friend = 1)