[英]MySQL number of rows per time
我正在嘗試建立一個查詢,以顯示每個月/年的用戶總數。 我現在擁有的查詢向我顯示了在任何特定月份/年份中創建的用戶。 但是我想要的是到那時為止的用戶總數,而不僅僅是那段時間創建的用戶總數。 這是表結構:
mysql> desc users;
+-------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------------+------------------+------+-----+---------+----------------+
| id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| username | int(11) | NO | | NULL | |
| password | varchar(255) | NO | | NULL | |
| email | varchar(255) | NO | | NULL | |
| legajo | int(10) unsigned | NO | | NULL | |
| doc_tipo | varchar(45) | NO | | NULL | |
| doc_nro | int(10) unsigned | NO | | NULL | |
| activo | int(10) unsigned | NO | | 0 | |
| token_actv | varchar(255) | NO | | NULL | |
| token_fecha_envio | datetime | NO | | NULL | |
| created | datetime | YES | | NULL | |
| modified | datetime | YES | | NULL | |
| role | varchar(60) | NO | | usuario | |
| nombres | varchar(255) | YES | | NULL | |
| apellido | varchar(255) | YES | | NULL | |
+-------------------+------------------+------+-----+---------+----------------+
這是查詢。
SELECT CONCAT_WS('/',Month(created),YEAR(created)), Count(*)
FROM users
GROUP BY Month(created),YEAR(created)
ORDER BY Month(created) ASC ,YEAR(created) ASC
當前查詢的結果如下:
mysql> SELECT CONCAT_WS('/',Month(created),YEAR(created)), Count(*) FROM users GROUP BY Month(created),YEAR(created) ORDER BY Month(created) ASC ,YEAR(created) ASC LIMIT 5;
+---------------------------------------------+----------+
| CONCAT_WS('/',Month(created),YEAR(created)) | Count(*) |
+---------------------------------------------+----------+
| 1/2010 | 79 |
| 1/2011 | 70 |
| 1/2012 | 70 |
| 1/2013 | 80 |
| 1/2014 | 64 |
+---------------------------------------------+----------+
任何幫助將不勝感激。
您需要做的就是使用您擁有的查詢作為另一個查詢的輸入,然后使用mysql變量來保存累計和-假設您將年/月字符串別名為d,並將計數值別名為c:
select d , @sum := @sum + c as rolling_total from (
SELECT CONCAT_WS('/',Month(created),YEAR(created)) d, Count(*) c
FROM users
GROUP BY Month(created),YEAR(created)
ORDER BY Month(created) ASC ,YEAR(created) ASC
) q cross join (select @sum := 0) qq
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