LeetCode in Kotlin
1050. Actors and Directors Who Cooperated At Least Three Times
Easy
SQL Schema
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.
Solution
# Write your MySQL query statement below
SELECT actor_id, director_id
FROM ActorDirector
GROUP BY actor_id, director_id
HAVING COUNT(*) > 2