通过 JOIN TABLE 获取最新记录和条件

Question

我能够使用此查询（不添加日期条件）获得客户 c001 的最新购买 (package_id)。

SELECT  s1.date, s1.client_id, s1.package_id 
FROM purchaseHistory s1 
LEFT JOIN purchaseHistory s2 ON s1.date < s2.date 
                            AND s1.client_id = s2.client_id
WHERE  s1.released = '1'
  AND s1.verified = '1'
  AND s2.client_id IS NULL
  AND s1.client_id = c001

目前，我希望能在日期之前获得最新购买 (2021-10-26 23:59:59)。以下代码是我的查询。

SELECT  s1.date, s1.client_id, s1.package_id 
FROM purchaseHistory s1 
LEFT JOIN purchaseHistory s2 ON s1.date < s2.date 
                            AND s1.client_id=s2.client_id 
                            AND s1.date <= 2021-10-26 23:59:59 
WHERE  s1.released = '1'
  AND s1.verified = '1'
  AND s2.client_id IS NULL
  AND s1.client_id = c001

相反，它返回所有购买的 (package_id) 并忽略条件 (s1.date <= 2021-10-26 23:59:59)

Answer 1

date(s1.date)<=CURDATE()

如果您正在使用 MySQL 并希望在当前日期之前或当前获取记录。