我使用mysqlGREATEST()函数从任一列(苹果或桃子)中选择最高整数值。
+----+------------------+
| 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
在每个值旁边,我想回显相应的水果名称和一个水果图标。如何通过MYSQL查询实现下面的图像?
另外,请注意,
GREATEST()
函数不会显示相等的值。是否也有显示相等值的方法? 最佳答案
SELECT
IF(apples >= peaches, apples, peaches) AS quantity,
IF(apples >= peaches, 'apples', 'peaches') AS fruit
FROM ...
或者,如果您不想让apples作为equal的默认值,并且想知道两种水果的代表性是相等的:
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 ...
关于php - 通过great()检测查询的字段,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/4356596/