调试中...
行 1，列 1
Product =
| product_id | product_name |
| ---------- | ------------ |
| 1 | LC Phone |
| 2 | LC T-Shirt |
| 3 | LC Keychain |
Sales =
| product_id | period_start | period_end | average_daily_sales |
| ---------- | ------------ | ---------- | ------------------- |
| 1 | 2019-01-25 | 2019-02-28 | 100 |
| 2 | 2018-12-01 | 2020-01-01 | 10 |
| 3 | 2019-12-01 | 2020-01-31 | 1 |
[object Object]