HAVING子句有什么问题？

Question

我试图编写以下查询with HAVING子句,以避免编写子查询,从而使查询的可读性稍差:

SELECT partner_id, player_id, currency_id, platform_id 
FROM account
GROUP BY partner_id, player_id, currency_id, platform_id
HAVING MAX(date) = date

我需要获取所有行,按照我在GROUP BY子句中指定的那些进行分组max date.但我得到了错误

ERROR:  column "account.date" must appear in 
the GROUP BY clause or be used in an aggregate function

我在聚合函数中使用它.怎么了？

Answer 1

您可以使用窗口函数来指定行号(如果要取最后绑定的行,则可以使用排名):

SELECT * FROM (
  SELECT partner_id, player_id, currency_id, platform_id,
     ROW_NUMBER() OVER (
       PARTITION BY partner_id, player_id, currency_id, platform_id
       ORDER BY date desc) as rn
  FROM account
  ) as t
WHERE t.rn = 1