1050.-actors-and-directors-who-cooperated-at-least-three-times.md

1050. Actors and Directors Who Cooperated At Least Three Times

Table: ActorDirector

+-------------+---------+
| Column Name | Type    |
+-------------+---------+
| actor_id    | int     |
| director_id | int     |
| timestamp   | int     |
+-------------+---------+
timestamp is the primary key column for this table.

Write a SQL query for a report that provides the pairs (actor_id, director_id) where the actor has cooperated with the director at least three times.

Return the result table in any order.

The query result format is in the following example.

Example 1:

Input: 
ActorDirector table:
+-------------+-------------+-------------+
| actor_id    | director_id | timestamp   |
+-------------+-------------+-------------+
| 1           | 1           | 0           |
| 1           | 1           | 1           |
| 1           | 1           | 2           |
| 1           | 2           | 3           |
| 1           | 2           | 4           |
| 2           | 1           | 5           |
| 2           | 1           | 6           |
+-------------+-------------+-------------+
Output:
+-------------+-------------+
| actor_id    | director_id |
+-------------+-------------+
| 1           | 1           |
+-------------+-------------+
Explanation:
 The only pair is (1, 1) where they cooperated exactly 3 times.

MySQL

Result

Runtime: 401 ms, faster than 62.64% of MySQL online submissions for Actors and Directors Who Cooperated At Least Three Times.

Memory Usage: 0B, less than 100.00% of MySQL online submissions for Actors and Directors Who Cooperated At Least Three Times.

SQL Schema

Create table If Not Exists ActorDirector
(
    actor_id    int,
    director_id int,
    timestamp   int
);

Truncate table ActorDirector;

insert into ActorDirector (actor_id, director_id, timestamp)
values ('1', '1', '0');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('1', '1', '1');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('1', '1', '2');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('1', '2', '3');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('1', '2', '4');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('2', '1', '5');

insert into ActorDirector (actor_id, director_id, timestamp)
values ('2', '1', '6');

Solution

select actor_id, director_id
from ActorDirector
group by actor_id, director_id
having count(actor_id) >= 3