refactor 1355

Author: fishercoder1534

Diff for: database/_1355.sql

@@ -1,67 +1,3 @@
---1355. Activity Participants
---
---Table: Friends
---
---+---------------+---------+
---| Column Name   | Type    |
---+---------------+---------+
---| id            | int     |
---| name          | varchar |
---| activity      | varchar |
---+---------------+---------+
---id is the id of the friend and primary key for this table.
---name is the name of the friend.
---activity is the name of the activity which the friend takes part in.
---Table: Activities
---
---+---------------+---------+
---| Column Name   | Type    |
---+---------------+---------+
---| id            | int     |
---| name          | varchar |
---+---------------+---------+
---id is the primary key for this table.
---name is the name of the activity.
---
---
---Write an SQL query to find the names of all the activities with neither maximum, nor minimum number of participants.
---
---Return the result table in any order. Each activity in table Activities is performed by any person in the table Friends.
---
---The query result format is in the following example:
---
---Friends table:
---+------+--------------+---------------+
---| id   | name         | activity      |
---+------+--------------+---------------+
---| 1    | Jonathan D.  | Eating        |
---| 2    | Jade W.      | Singing       |
---| 3    | Victor J.    | Singing       |
---| 4    | Elvis Q.     | Eating        |
---| 5    | Daniel A.    | Eating        |
---| 6    | Bob B.       | Horse Riding  |
---+------+--------------+---------------+
---
---Activities table:
---+------+--------------+
---| id   | name         |
---+------+--------------+
---| 1    | Eating       |
---| 2    | Singing      |
---| 3    | Horse Riding |
---+------+--------------+
---
---Result table:
---+--------------+
---| results      |
---+--------------+
---| Singing      |
---+--------------+
---
---Eating activity is performed by 3 friends, maximum number of participants, (Jonathan D. , Elvis Q. and Daniel A.)
---Horse Riding activity is performed by 1 friend, minimum number of participants, (Bob B.)
---Singing is performed by 2 friends (Victor J. and Jade W.)
-
 --# Write your MySQL query statement below
 select activity from Friends group by activity
 having count(id) not in