Question

我有一个表，该表在帐户1、2、3、4等中具有数值，并带有日期（例如：今天和昨天）我如何计算今天和昨天的账户1、2、3、4之间的差额？谢谢！

这是数据

+--------------+-------------+------------+
|      GL      |   Amount    |    Date    |
+--------------+-------------+------------+
| Bank account |    77000000 | 10/05/2019 |
| Bank account |    30373448 | 9/05/2019  |
| Cost         |    49552128 | 10/05/2019 |
| Cost         |  3363508.25 | 9/05/2019  |
| Div          |        3050 | 10/05/2019 |
| Div          | 609177.8125 | 9/05/2019  |
+--------------+-------------+------------+

Answer 1

select y.account_value as yesterdays_value
    , b.account_value as todays_value
    , b.account_value - y.account_value as dif_in_account_value
from (select * from your_table where date_time = yesterday) y
join (select * from your_table where date_time = today) t
    on y.account_id = t.account_id

Answer 2

假设您使用的是Oracle，并且“日期”列为DATE，且时间始终等于00:00:00，则可以尝试以下操作：

SELECT tday.gl                   AS account,
       tday.amount               AS todays_amount,
       yday.amount               AS yesterdays_amount,
       tday.amount - yday.amount AS difference
FROM   my_table tday
JOIN   my_table yday
  ON   tday.gl = yday.gl
 AND   tday.date = yday.date + 1
WHERE  tday.date = TO_DATE('20190510', 'YYYYMMDD');

当然，仅当每个帐户今天有1条记录且昨天有1条记录时，这才返回正确的结果。

计算一个查询中多行之间的差异

2 个答案: