需要在 SQL 中查找 Min & Max 日期特定狀態列值

Question

下表產品：

+--------------+-----------+--------+-----------+
| Product_code | Prod Name | Status |   Date    |
+--------------+-----------+--------+-----------+
| A            | AA1       | New    | 12/3/2019 |
| A            | AA2       | Expiry | 7/20/2017 |
+--------------+-----------+--------+-----------+

預期 output：

+--------------+-----------+------------+-----------+------------+------------+
| Product_code | Min_date  | Min_status | Max_date  | Max_status | count_Prod |
+--------------+-----------+------------+-----------+------------+------------+
| A            | 7/20/2017 | Expiry     | 12/3/2019 | New        |          2 |
+--------------+-----------+------------+-----------+------------+------------+

嘗試使用以下查詢

SELECT Product_code,MIN(Date) as "Min_date", MAX(Date) as 
"Max_date",count(Prod_Name) as "count_Prod"
FROM Product where Product_code ='A'  
GROUP BY Product_code
ORDER BY Product_code;

需要幫助來提取日期列的特定狀態。

Answer 1

請使用以下查詢。 您也可以將 Min 和 Max function 用於字符串列。 它根據字母順序聚合。

SELECT Product_code,MIN(Date) as "Min_date", MIN(Status) as Min_Status,  MAX(Date) as 
"Max_date", MAX(Status) as Max_Status,count(Prod_Name) as "count_Prod"
FROM Product where Product_code ='A'  
GROUP BY Product_code
ORDER BY Product_code;