每天计算每个状态为 CANCELED 的事务

Question

| id | status    | Transaction date    | Vendor    | Customer ID          |
|  1 | Completed | 2019-11-15 11:46:11 | Vendor A  | 12345                |
|  2 | Completed | 2019-11-14 23:03:24 | Vendor B  | 67891                |
|  3 | Completed | 2019-11-15 12:04:13 | Vendor C  | 456                  |
|  4 | Cancelled | 2019-11-14 11:46:11 | Vendor A  | 22225                |
|  5 | Cancelled | 2019-11-20 23:03:24 | Vendor B  | 789999               |
|  6 | Cancelled | 2019-11-20 12:04:13 | Vendor C  | 789999               |

你能帮我计算每个供应商的交易，状态为每天取消吗？ 我正在尝试但失败了

EXPECTATION

Transaction date    | Vendor    | TOTAL TRANSACTION
2019-11-14          | Vendor A  | 1
2019-11-20          | Vendor B  | 1
2019-11-20          | Vendor C  | 1

Answer 1

似乎您想要以下内容，这不是您所要求的。 这是一个简单的GROUP BY 。

SELECT date(transaction_date), vendor, count(*)
FROM table
WHERE status = 'Cancelled'
GROUP BY transaction_date, vendor