Question

我正在尝试收集有关我正在使用的数据库的统计信息，我想知道每月在数据库中创建了多少条目，因为时间范围超过一年而被卡住，例如它始于2010年2月，目前结束。

现在我正在尝试做这样的事情：

startDate = `mysql -h <hostname> -u root -D build -e "select MIN(submittime) '
Start Date' from builds;"`

endDate = `mysql -h <hostname> -u root -D build -e "select MAX(submittime) 'En
d Date' from builds;"`

months = []
months.push(`mysql -h <hostname> -u root -D build -e "select count(id) 
from builds where submittime >= startDate 
and submittime <= date_add(startDate, interval 30 DAY);"`

...等任何帮助/想法都会很棒。感谢。

Answer 1

添加GROUP BY MONTH（提交时间）。

Answer 2

如下：

SELECT COUNT(id), CONCAT(MONTH(submittime),'-',YEAR(submittime)) AS start 
   FROM builds GROUP BY start

或者更简单地说

SELECT COUNT(id), submittime
   FROM builds GROUP BY YEAR(submittime), MONTH(submittime)

按月计算mysql数据库中的条目

2 个答案: