php mysql与HAVING和MAX查询

Question

你好，我需要一些帮助，让我的MySQL正确。 我需要选择具有最大“var”列值的一行。 这就是我现在所拥有的，但它不会给最大

SELECT a.* FROM `table` AS a GROUP BY a.var HAVING a.var = MAX(a.var) AND `code` = '1' AND `type` = '0'; 

Answer 1

您可以使用ORDER BY与LIMIT 1：

SELECT col1, col2, ..., coln 
FROM `table` 
WHERE `code` = '1' AND `type` = '0' 
ORDER BY `var` DESC 
LIMIT 1 

Answer 2

这可能是你所需要的：

SELECT MAX(vari) 
FROM TABLE 
WHERE `code` = '1' AND `type` = '0'