MySQL的具体查询需求

Question

我在 “销售” 表有日期时间字段名 “salestime”

我需要得到的数据为：

SalesMonthYear  Total 
2010-11    10 
2010-10    15 
2010-09    21 

或

Nov-2010   10 
Oct-2010   15 
Sep-2010   21 

任何一个知道如何我可以使用查询来实现这个吗？ 感谢您的帮助

Answer 1

SELECT DATE_FORMAT(salesTime, '%Y-%m') AS salesMonthYear, 
     COUNT(*) AS salesCount 
FROM sales 
GROUP BY DATE_FORMAT(salesTime, '%Y-%m') 

Answer 2

您需要使用DATE_FORMAT和GROUP BY才能达到您想要的效果。这个查询将做到这一点：

SELECT DATE_FORMAT(salestime, '%Y-%m') as SalesMonthYear, count(*) as `Total` FROM `sales` GROUP BY SalesMonthYear ORDER BY `salestime` 

而对第二个版本：

SELECT DATE_FORMAT(salestime, '%b-%Y') as SalesMonthYear, count(*) as `Total` FROM `sales` GROUP BY SalesMonthYear ORDER BY `salestime`