通過最大值檢測查詢字段（）

Question

我使用mysql GREATEST()函數從列（蘋果或桃子）中選擇最高的整數值。

+----+------------------+ 
| id | apples | peaches | 
+----+------------------+ 
| 1 | 8 | 4 | 
| 2 | 2 | 6 | 
| 3 | 3 | 9 | 
| 4 | 7 | 2 | 
| 5 | 4 | 4 | 
+----+------------------+ 

使用$result = "SELECT GREATEST(apples, peaches) FROM table";和echo $result，我得到：

8 
6 
9 
7 

下一頁到每個值，我想呼應相應的水果名稱和水果圖標。如何通過MYSQL查詢實現下面的圖像？

另外，注意相等的值不被GREATEST()功能顯示。有沒有辦法顯示相等的值？

Answer 1

SELECT 
IF(apples >= peaches, apples, peaches) AS quantity, 
IF(apples >= peaches, 'apples', 'peaches') AS fruit 
FROM ... 

，或者，如果你不想讓蘋果成爲平等默認的，想知道當兩個水果也同樣表示：

SELECT 
IF(apples >= peaches, apples, peaches) AS quantity, 
CASE WHEN apples > peaches THEN 'apples' WHEN peaches > apples THEN 'apples' ELSE 'both' END AS fruit 
FROM ...