我似乎在提出一个问题来实现我想要的东西上有点麻烦。我有一张像下面这样的桌子。
| Date(TIMESTAMP) | Count |
|---------------------|-------|
| 2016-02-01 01:00:00 | 52 |
| 2016-01-05 11:30:00 | 14 |
| 2016-02-01 04:20:00 | 36 |
| ... | ... |
该表大约有40,000行。我想要做的是获取多个日期范围的总数,这样我就可以得到以下结果…
| Period | Total |
|------------|-------|
| All | 10245 |
| Past year | 1401 |
| Past month | 104 |
| Past week | 26 |
目前,我正在运行PHP脚本中的一个循环,并对要查找的每个日期范围执行单独的查询。实际上,我在每个循环中执行大约10个查询来获取不同的统计数据,但对于这个示例,我将其简化。这需要永远的时间,我希望有一种更优雅的方式来做这件事,然而我现在已经花了相当多的时间尝试不同的东西和研究,但一无所获。我知道如何使用案例进行分组,但不知道当一条记录可能需要放在多个存储箱中时。有什么帮助吗?
发布于 2016-03-01 12:11:42
尝试此UNION
查询:
SELECT 'All', COUNT(*) AS Total FROM yourTable
UNION
SELECT 'Past year', COUNT(*) AS Total
FROM yourTable
WHERE DATE(TIMESTAMP) > DATE_ADD(NOW(), INTERVAL -1 YEAR)
UNION
SELECT 'Past month', COUNT(*) AS Total
FROM yourTable
WHERE DATE(TIMESTAMP) > DATE_ADD(NOW(), INTERVAL -1 MONTH)
UNION
SELECT 'Past week', COUNT(*) AS Total
FROM yourTable
WHERE DATE(TIMESTAMP) > DATE_ADD(NOW(), INTERVAL -1 WEEK)
发布于 2016-03-01 13:27:41
第一个。了解获取一年的第一个日期、一个月的第一个日期和一周的第一个日期的函数。然后使用count和filter将不同时期的第一个日期和最后一个日期组合成sql。
参考:
MySQL Select First Day of Year and Month
月份https://stackoverflow.com/a/19259159/1258492
week https://stackoverflow.com/a/11831133/1258492
select 'All' as period, count(1) from
tbl
union
select 'Past Year' as period, count(1) from
tbl
where timestamp between
MAKEDATE(year(now())-1,1) and
last_day(MAKEDATE(year(now())-1,1) + interval 11 month)
union
select 'Past Month' as period, count(1) from
tbl
where timestamp between
LAST_DAY(NOW() - INTERVAL 2 MONTH) + INTERVAL 1 DAY and
LAST_DAY(NOW() - INTERVAL 1 MONTH)
union
select 'Past Week' as period, count(1) from
tbl
where timestamp between
adddate(curdate(), INTERVAL 1-DAYOFWEEK(curdate())-7 DAY) and
adddate(curdate(), INTERVAL 7-DAYOFWEEK(curdate())-7 DAY) ;
发布于 2018-07-01 00:22:54
您可以使用子查询。每次使用一个子查询,如下所示:
SELECT everything, 'past year'
FROM
(
SELECT sum(c) AS 'everything'
FROM reports
) t1,
(
SELECT sum(c) AS 'past year'
FROM reports
WHERE d >= DATE_ADD(CURDATE(), INTERVAL -1 YEAR)
) t2
https://stackoverflow.com/questions/35714449
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