我有按天呈现的数据，我想将数据转换为月度报告。数据看起来像这样。
如何创建一个报告，其中提供了 6 月、7 月、8 月等月份的总收入和净收入，其中数据按天报告？
到目前为止，这就是我所拥有的
SELECT invoice_date,
SUM(gross_revenue) AS gross_revenue,
SUM(net_revenue) AS net_revenue
FROM wc_revenue
GROUP BY invoice_date
我会简单地按年和月分组。
SELECT invoice_date,
SUM(gross_revenue) AS gross_revenue,
SUM(net_revenue) AS net_revenue
FROM wc_revenue GROUP BY year(invoice_date), month(invoice_date)
由于我不知道您是否可以访问yearandmonth函数，因此另一种解决方案是将日期转换为 varchar 并按最左边的 7 个字符（年+月）分组
SELECT left(cast(invoice_date as varchar(50)),7) AS invoice_date,
SUM(gross_revenue) AS gross_revenue,
SUM(net_revenue) AS net_revenue
FROM wc_revenue GROUP BY left(cast(invoice_date as varchar(50)),7)
你可以尝试一个ROLLUP. 下面的示例图：
表数据：
mysql> select * from wc_revenue;
+--------------+---------------+-------------+
| invoice_date | gross_revenue | net_revenue |
+--------------+---------------+-------------+
| 2018-06-28 | 1623.99 | 659.72 |
| 2018-06-27 | 112414.65 | 38108.13 |
| 2018-06-26 | 2518.74 | 1047.14 |
| 2018-06-25 | 475805.92 | 172193.58 |
| 2018-06-22 | 1151.79 | 478.96 |
| 2018-07-02 | 150.00 | 100.00 |
| 2018-07-05 | 350.00 | 250.00 |
| 2018-08-07 | 600.00 | 400.00 |
| 2018-08-09 | 900.00 | 600.00 |
+--------------+---------------+-------------+
mysql> SELECT month(invoice_date) as MTH, invoice_date, SUM(gross_revenue) AS gross_revenue, SUM(net_revenue) AS net_revenue
FROM wc_revenue
GROUP BY MTH, invoice_date WITH ROLLUP;
+------+--------------+---------------+-------------+
| MTH | invoice_date | gross_revenue | net_revenue |
+------+--------------+---------------+-------------+
| 6 | 2018-06-22 | 1151.79 | 478.96 |
| 6 | 2018-06-25 | 475805.92 | 172193.58 |
| 6 | 2018-06-26 | 2518.74 | 1047.14 |
| 6 | 2018-06-27 | 112414.65 | 38108.13 |
| 6 | 2018-06-28 | 1623.99 | 659.72 |
| 6 | NULL | 593515.09 | 212487.53 |
| 7 | 2018-07-02 | 150.00 | 100.00 |
| 7 | 2018-07-05 | 350.00 | 250.00 |
| 7 | NULL | 500.00 | 350.00 |
| 8 | 2018-08-07 | 600.00 | 400.00 |
| 8 | 2018-08-09 | 900.00 | 600.00 |
| 8 | NULL | 1500.00 | 1000.00 |
| NULL | NULL | 595515.09 | 213837.53 |
+------+--------------+---------------+-------------+