Easy to understand | Formatted | Simple | MySql solution
\nselect\n   product_name,\n   sum(unit) as unit \nfrom\n   products p \n   join\n      orders o \n      on p.product_id = o.product_id \nwhere\n   o.order_date
```\nselect\n   product_name,\n   sum(unit) as unit \nfrom\n   products p \n   join\n      orders o \n      on p.product_id = o.product_id \nwhere\n   o.order_date >= \'2020-02-01\' \n   and o.order_date <= \'2020-02-29\' \ngroup by\n   p.product_id \nhaving\n   unit >= 100;\n```\n\n**I hope that you\'ve found the solution useful.**\n*In that case, please do upvote and encourage me to on my quest to document all leetcode problems\uD83D\uDE03*\nPS: Search for **mrmagician** tag in the discussion, if I have solved it, You will find it there\uD83D\uDE38
['MySQL']