Question

尝试创建显示活动/非活动帐户的CASE字段。活跃帐户在过去90天内下了订单。

我遇到了数据类型的问题，无法找到解决方案。这是我正在尝试运行的代码：

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;

这是我得到的错误代码：

ERROR:  operator does not exist: interval <= date
LINE 4:    WHEN (CURRENT_DATE - MAX(date)) <= CURRENT_DATE - 90 THEN...
                                           ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
SQL state: 42883
Character: 261

非常感谢任何帮助。谢谢！

Answer 1

请尝试在下面运行：

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;

Answer 2

我相信这是你想要的逻辑：

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。它应该没有任何问题。

我也猜测每个帐户只有一个客户，因此每accountid返回一行，而不依赖distinct on。

POSTGRESQL - “错误：运算符不存在：interval＆lt; = date”

2 个答案: