Question

我有这个问题：

SELECT NAME, date, price 
    FROM purchase 
    WHERE Max(date) < '$lastweek' 
       AND NAME = '$customer' 
       GROUP BY NAME;

查询如何查找最近的日期并检查具有给定日期的日期？

Answer 1

您可以尝试这样：

SELECT NAME, date, price 
    FROM purchase 
    WHERE (SELECT Max(date) FROM purchase) < '$lastweek' 
       AND NAME = '$customer' 
       GROUP BY NAME;

Answer 2

您是否尝试将SELECT MAX(date)作为子查询购买？

SELECT NAME, date, price 
    FROM purchase 
    WHERE (SELECT Max(date)) < $lastweek

Answer 3

你可以这样做：

SELECT name, MAX(date) as latest_date, price 
FROM purchase 
WHERE name= '$customer' 
GROUP BY name HAVING latest_date = '$date';

如何在mysql的where子句中使用max？

3 个答案: