用于每年或每月汇总的 MySql 查询

Question

我有以下表结构:table={id,DailyDate,value1,value2} 与 DailyDate ex。 2000-01-01

我如何才能获得每个值的每月和每年的汇总结果？

我尝试了以下方法，但不起作用

Select Sum(Value1),Year(DailyDate),Month(DailyDate)
From table
Group by Year(DailyDate),Month(DailyDate)
Order by Year(DailyDate),Month(DailyDate)

我

Answer 1

如果您要求的是按年份分类汇总，请尝试以下操作:

SELECT TheSum, TheYear, COALESCE(TheMonth, CONCAT('Total Year ', TheYear))
FROM (
  SELECT
    SUM(Value1) TheSum,
    YEAR(DailyDate) AS TheYear,
    MONTH(DailyDate) AS TheMonth
  FROM table
  GROUP BY Year(DailyDate), MONTH(DailyDate) WITH ROLLUP) x
WHERE TheYear IS NOT NULL

内部查询使用 WITH ROLLUP 生成按月的小计和按年的总计。外部查询格式化年份并删除总计。