从特定日期开始按7天间隔对行进行分组 [英] Group rows by 7 days interval starting from a certain date

问题描述

是否有一种方法可以从Mysql中的某个日期开始按7天的时间间隔(日期时间)对行进行分组?

Is there a way to group rows by a 7 days intervals(datetime) starting from a certain date in Mysql?

推荐答案

SELECT 
    1 + DATEDIFF(columnDate, @start_date) DIV 7  AS weekNumber
  , @start_date + INTERVAL (DATEDIFF(columnDate, @start_date) DIV 7) WEEK
      AS week_start_date
  , MIN(columnDate) AS actual_first_date
  , MAX(columnDate) AS actual_last_date
  , SUM(otherColumn)
  , AVG(otherColumn)
  --- 
FROM 
    tableX 
WHERE 
    columnDate >= @start_date 
GROUP BY
    DATEDIFF(columnDate, @start_date) DIV 7 ;

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