Problem

+---------------+---------+
| Column Name   | Type    |
+---------------+---------+
| program_date  | date    |
| content_id    | int     |
| channel       | varchar |
+---------------+---------+

+------------------+---------+
| Column Name      | Type    |
+------------------+---------+
| content_id       | varchar |
| title            | varchar |
| Kids_content     | enum    |
| content_type     | varchar |
+------------------+---------+

Write an SQL query to report the distinct titles of the kid-friendly movies streamed in June 2020.

Solution

Method 1 - Subquery

Code

Sql
SELECT title FROM Content 
WHERE content_type = 'Movies' AND Kids_content = 'Y' AND content_id IN (
SELECT content_id FROM TVProgram
WHERE MONTH(program_date) = '6');

Method 2 - Join

Code

Sql

Alternative. This joins the tables rather than uses a subquery. It also makes sure the year is correct. Something I missed.

SELECT DISTINCT c.title
FROM Content c
JOIN TVProgram p
    ON c.content_id = p.content_id
WHERE c.Kids_content = 'Y'
    AND c.content_type = 'Movies'
    AND MONTH(p.program_date) = 6
    AND YEAR(p.program_date) = 2020;