MySQL特定的查询要求

Question

我在“sales”表中有datetime字段名称“salestime”

我需要获取数据：

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

或

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

任何人都知道如何使用查询实现此目的？ 谢谢你的帮助

Answer 1

您需要使用DATE_FORMAT和GROUP BY来实现您的目标。此查询将执行此操作：

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

对于第二个版本：

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

Answer 2

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