MYSQL very simple solution
\n# Write your MySQL query statement below\nselect p.product_id, p.product_name\nfrom product p\njoin sales s\non p.product_id=s.product_id\ngroup by s.product_
```\n# Write your MySQL query statement below\nselect p.product_id, p.product_name\nfrom product p\njoin sales s\non p.product_id=s.product_id\ngroup by s.product_id\nhaving min(s.sale_date)>=\'2019-01-01\' and max(s.sale_date)<=\'2019-03-31\'\n```
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