easy mysql using left join, group by, and having
\nselect product_name, sum(unit) as unit\nfrom Products p\nleft join Orders o on p.product_id =o.product_id\nwhere order_date like "2020-02%"\ngroup by o.produc
```\nselect product_name, sum(unit) as unit\nfrom Products p\nleft join Orders o on p.product_id =o.product_id\nwhere order_date like "2020-02%"\ngroup by o.product_id \nhaving sum(unit) >= 100;\n```
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