POSTGRESQL-“；错误：运算符不存在：间隔<；=日期“；

尝试创建显示活动/非活动帐户的案例字段。活跃客户已在过去90天内下单

我遇到了数据类型问题，无法找到解决方案。下面是我试图运行的代码：

SELECT DISTINCT ON (accountid)
    accountid, customer, round(AVG(qty),2) AS average_order_qty, ROUND(AVG(total),2) AS avg_order_rev, (CURRENT_DATE - MAX(date)) as days_since_order, (CURRENT_DATE - MAX(date)) as active,
        CASE 
            WHEN (CURRENT_DATE - MAX(date)) <= CURRENT_DATE - 90 THEN 'Yes'
            ELSE 'No'
        END
FROM m2m_kit_total
GROUP BY accountid, customer
ORDER BY accountid, MAX(date) DESC NULLS LAST;

在（accountid）上选择DISTINCT
accountid，customer，round（平均（数量），2）作为平均订单数量，round（平均（总数），2）作为平均订单版本，（当前日期-最大（日期））作为自订单起的天数，（当前日期-最大（日期））作为活动，
案例
当（当前_日期-最大（日期））时，请尝试运行以下命令：

SELECT DISTINCT ON (accountid)
    accountid, customer, round(AVG(qty),2) AS average_order_qty, ROUND(AVG(total),2) AS avg_order_rev, (CURRENT_DATE - MAX(date)) as days_since_order, (CURRENT_DATE - MAX(date)) as active,
        CASE 
            WHEN ((CURRENT_DATE - MAX(date)) = (CURRENT_DATE - 90)) THEN 'Yes'
            ELSE 'No'
        END
FROM m2m_kit_total
GROUP BY accountid, customer
ORDER BY accountid, MAX(date) DESC NULLS LAST;

我相信这就是你想要的逻辑：

SELECT accountid, customer, round(AVG(qty), 2) AS average_order_qty, 
       ROUND(AVG(total), 2) AS avg_order_rev,
       (CURRENT_DATE - MAX(date)) as days_since_order,
       (CASE WHEN MAX(date) >= CURRENT_DATE - INTERVAL '90 DAY' THEN 'Yes'
             ELSE 'No'
        END) as is_active
FROM m2m_kit_total
GROUP BY accountid, customer
ORDER BY accountid, MAX(date) DESC NULLS LAST;

这是两个日期的简单比较。它不应该有任何问题

我还猜测每个帐户只有一个客户，因此每个
accountid
返回一行，而不依赖
distinct on
错误：运算符不存在：间隔=日期行4:WHEN（（当前日期-最大（日期））=（当前日期…^提示：没有与给定名称和参数类型匹配的运算符。您可能需要添加显式类型强制转换。SQL状态：42883字符：280这90是什么？您正在减去它？它是日期还是天数/它是天数。Gordon在上面的回答中解决了我的问题。感谢您的帮助！您知道您的条件<代码>（当前日期-最大（日期））=90

？是的！谢谢，戈登！工作得很好。

SELECT accountid, customer, round(AVG(qty), 2) AS average_order_qty, 
       ROUND(AVG(total), 2) AS avg_order_rev,
       (CURRENT_DATE - MAX(date)) as days_since_order,
       (CASE WHEN MAX(date) >= CURRENT_DATE - INTERVAL '90 DAY' THEN 'Yes'
             ELSE 'No'
        END) as is_active
FROM m2m_kit_total
GROUP BY accountid, customer
ORDER BY accountid, MAX(date) DESC NULLS LAST;