我有一个表为我的用户有一个名为“已创建”的字段具有注册日期。Mysql查询得到每月计数
如何获得包含过去12个月每月注册次数的清单? 像这样:
Month Count
1 1232
2 2222
3 122
4 4653
... ...
12 7654
我不习惯使用MySQL,所以直到现在我才知道怎么算,去年注册的数量,而不是如何通过过去12个月算组。提前致谢!
UPDATE
现在我得到这个,使用@fthiella解决方案:
+------------------------------+-------------------------------+----------+
| Year(FROM_UNIXTIME(created)) | Month(FROM_UNIXTIME(created)) | Count(*) |
+------------------------------+-------------------------------+----------+
| 2012 | 4 | 9927 |
| 2012 | 5 | 5595 |
| 2012 | 6 | 4431 |
| 2012 | 7 | 3299 |
| 2012 | 8 | 429 |
| 2012 | 10 | 3698 |
| 2012 | 11 | 6208 |
| 2012 | 12 | 5142 |
| 2013 | 1 | 1196 |
| 2013 | 2 | 10 |
+------------------------------+-------------------------------+----------+
如何强制查询给我数= 0个月?
解决方案通过@fthiella(非常感谢!):
SELECT y, m, Count(users.created)
FROM (
SELECT y, m
FROM
(SELECT YEAR(CURDATE()) y UNION ALL SELECT YEAR(CURDATE())-1) years,
(SELECT 1 m UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4
UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8
UNION ALL SELECT 9 UNION ALL SELECT 10 UNION ALL SELECT 11 UNION ALL SELECT 12) months) ym
LEFT JOIN users
ON ym.y = YEAR(FROM_UNIXTIME(users.created))
AND ym.m = MONTH(FROM_UNIXTIME(users.created))
WHERE
(y=YEAR(CURDATE()) AND m<=MONTH(CURDATE()))
OR
(y<YEAR(CURDATE()) AND m>MONTH(CURDATE()))
GROUP BY y, m;
而结果:
+------+----+----------------------+
| y | m | Count(users.created) |
+------+----+----------------------+
| 2012 | 5 | 5595 |
| 2012 | 6 | 4431 |
| 2012 | 7 | 3299 |
| 2012 | 8 | 429 |
| 2012 | 9 | 0 |
| 2012 | 10 | 3698 |
| 2012 | 11 | 6208 |
| 2012 | 12 | 5142 |
| 2013 | 1 | 1196 |
| 2013 | 2 | 10 |
| 2013 | 3 | 0 |
| 2013 | 4 | 0 |
+------+----+----------------------+
我创建的字段是一个int字段,因为我的注册日期是时间戳格式... –
'MONTH(FROM_UNIXTIME(your_field))'应该可以工作 – Vatev
@DavidR我更新了我的答案,不应该是正确的 – fthiella