如何根据上个月的计算更新每个月的期初余额?
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【中文标题】如何根据上个月的计算更新每个月的期初余额?【英文标题】:How can I update the beginning balance for each month based on prior month's calculation? 【发布时间】:2019-10-10 19:30:32 【问题描述】:我实际上是在尝试在 SQL 中计算滚动总计。我每个月都有几个不同的总额(费用、付款、调整、坏账),需要从上个月的期末余额中减去这些总额。 5 月,期末余额为 28,814,788 美元。考虑到 6 月份的总和(总计 1,030,927 美元),6 月份的期末余额现在应该是 27,783,862 美元(28,814,788 美元 - 830,998 美元)。这 27,783,862 美元现在应该是 7 月份的期初余额。
我编写了以下代码。 SELECT 子句中的子查询提供应从 6 月份的总数中减去 5 月份的未结余额(期末余额 28,814,788 美元)。
SELECT
CASE WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
ELSE 'Other' END as month_year,
(SELECT sum(OUTSTANDING_AMT)
FROM ARPB_TRANSACTIONS
WHERE POST_DATE BETWEEN '2019-05-01' AND '2019-05-31') as begin_bal,
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT) as charge_tot,
sum(PAYMENT_AMOUNT) as payment_tot,
sum(ADJUSTMENT_AMOUNT) as adjust_tot,
sum(ACTIVE_AR_IN_OUT) as bad_debt
FROM F_ARPB_CUBE_ETR_DETAIL
WHERE POST_DATE BETWEEN '2019-06-01' AND '2019-08-31'
GROUP BY
CASE WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
ELSE 'Other' END
预期结果为:DESIRED OUTPUT
【问题讨论】:
【参考方案1】:所以,我实际上找到了自己问题的答案。我走了几步。
首先,我决定通过添加一个列来反映费用、付款、调整和坏账的总和来进行一些整理。这在以后的运行总数中会派上用场。感觉有点“骇人听闻”,但我只是在学习,所以随便吧。
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT)+sum(PAYMENT_AMOUNT)+
sum(ADJUSTMENT_AMOUNT)+sum(ACTIVE_AR_IN_OUT) as sum_of_values
其次,我创建了一个运行总计。这最初是一个挑战,因为我无法引用月份和年份,除非我给它一个别名为 month_year 并放在 FROM 子句中的子查询中。
FROM
(SELECT
CASE WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
ELSE 'Other' END as month_year,
(SELECT sum(OUTSTANDING_AMT)
FROM ARPB_TRANSACTIONS
WHERE POST_DATE BETWEEN '2019-05-01' AND '2019-05-31') as beginning_balance,
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT) as charge_tot,
sum(PAYMENT_AMOUNT) as payment_tot,
sum(ADJUSTMENT_AMOUNT) as adjustment_tot,
sum(ACTIVE_AR_IN_OUT) as bad_debt_tot,
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT)+sum(PAYMENT_AMOUNT)+
sum(ADJUSTMENT_AMOUNT)+sum(ACTIVE_AR_IN_OUT) as sum_of_values
FROM F_ARPB_CUBE_ETR_DETAIL
WHERE POST_DATE BETWEEN '2019-06-01' AND '2019-08-31'
GROUP BY CASE
WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
ELSE 'Other' END ) as x
第三,这让我可以在我的运行总表达式中专门引用“month_year”:
SELECT month_year, beginning_balance,charge_tot, payment_tot, adjustment_tot, bad_debt_tot, sum_of_values, SUM(sum_of_values) OVER (ORDER BY month_year desc) as running_total
最后,我实际上需要从前几个月的运行总数中减去运行(即“开始余额”减去“总和值”),而不是运行(总和)总数,所以我只是修改了上面的表达式,如:
SELECT month_year, beginning_balance,charge_tot, payment_tot, adjustment_tot, bad_debt_tot, sum_of_values, beginning_balance-SUM(sum_of_values) OVER (ORDER BY month_year desc) as running_total
这是最后的查询:
SELECT month_year, beginning_balance,charge_tot, payment_tot, adjustment_tot, bad_debt_tot, sum_of_values, beginning_balance-SUM(sum_of_values) OVER (ORDER BY month_year desc) as running_total
FROM
(SELECT
CASE WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
ELSE 'Other' END as month_year,
(SELECT sum(OUTSTANDING_AMT)
FROM ARPB_TRANSACTIONS
WHERE POST_DATE BETWEEN '2019-05-01' AND '2019-05-31') as beginning_balance,
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT) as charge_tot,
sum(PAYMENT_AMOUNT) as payment_tot,
sum(ADJUSTMENT_AMOUNT) as adjustment_tot,
sum(ACTIVE_AR_IN_OUT) as bad_debt_tot,
sum(CHARGE_AMOUNT)+sum(VOID_AMOUNT)+sum(PAYMENT_AMOUNT)+
sum(ADJUSTMENT_AMOUNT)+sum(ACTIVE_AR_IN_OUT) as sum_of_values
FROM F_ARPB_CUBE_ETR_DETAIL
WHERE POST_DATE BETWEEN '2019-06-01' AND '2019-08-31'
GROUP BY CASE
WHEN POST_DATE BETWEEN '2019-06-01' AND '2019-06-30' THEN 'June - 2019'
WHEN POST_DATE BETWEEN '2019-07-01' AND '2019-07-31' THEN 'July - 2019'
WHEN POST_DATE BETWEEN '2019-08-01' AND '2019-08-31' THEN 'August - 2019'
ELSE 'Other' END ) as x
ORDER BY month_year desc
Final Output
【讨论】:
请注意,使用包容性上限意味着您需要在 2 月左右特别小心(取决于您获得月末日期的方式)。使用下一个月的专属上限(例如,WHEN POST_DATE >= '2019-06-01' AND POST_DATE < '2019-07-01'
)会更容易,如果POST_DATE
也有时间,则可以解决任何问题。您可能会发现使用日历表也会简化事情。
啊,非常感谢,我去看看日历表以上是关于如何根据上个月的计算更新每个月的期初余额?的主要内容,如果未能解决你的问题,请参考以下文章