MYSQL Solution distict , group_concat ,group by
\nselect \n    sell_date,\n    count(distinct(product)) as num_sold,\n    group_concat(distinct(product)) as products \nfrom Activities  \n    group by sell_dat
```\nselect \n    sell_date,\n    count(distinct(product)) as num_sold,\n    group_concat(distinct(product)) as products \nfrom Activities  \n    group by sell_date \n```
['MySQL']