需要在 SQL 中查找 Min & Max 日期特定状态列值

Question

下表产品：

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

预期 output：

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

尝试使用以下查询

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;

需要帮助来提取日期列的特定状态。

Answer 1

请使用以下查询。 您也可以将 Min 和 Max function 用于字符串列。 它根据字母顺序聚合。

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;