我有一张如下表:
def _settings_value_changed(self, key, value):
signal_name = "%s(PyQt_PyObject)" % key.replace("/", "_")
self.emit(SIGNAL(signal_name), value)
我遇到了一个问题,解决了如何按天划分,总结并包含缺失日期的问题。我试图让选择看起来像这样:
transID | date | payee | amount
1 | 7/1/2016 | Balance| 100.00
2 | 7/1/2016 | Bobi | -11.11
3 | 7/4/2016 | Chris | -20.76
4 | 7/7/2016 | Erin | -100.00
5 | 7/11/2016| Tom | -2.11
6 | 7/11/2016| Pay | 500.00
基本上我试图获得每个分组日期之间的所有日期并进行平衡。这将像银行帐户每天一样运作。
答案 0 :(得分:0)
只需要这样的东西,也许这不是正确的方式,但对我有用:)
SELECT
*
FROM
(SELECT
'2016-07-01' + INTERVAL a + b DAY myDate
FROM
(SELECT 0 a UNION SELECT 1 a UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT 5 UNION SELECT 6 UNION SELECT 7 UNION SELECT 8 UNION SELECT 9) d, (SELECT 0 b UNION SELECT 10 UNION SELECT 20 UNION SELECT 30 UNION SELECT 40) m
WHERE
'2016-07-01' + INTERVAL a + b DAY < '2016-08-01'
ORDER BY a + b) t1
LEFT JOIN
(SELECT
COUNT(*) AS myCount, DATE(your_date_field) AS myFS
FROM
your_table_that_misses_dates
GROUP BY myFS) t2 ON t1.myDate = t2.myFS order by myDate;