從某個日期開始的7天組間隔行數

Question

有沒有辦法在Mysql中從某個日期開始以7天爲間隔（日期時間）對行進行分組？

Answer 1

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 ; 

Answer 2

SELECT users.* from users 
WHERE created_at >= '2011-12-01' 
AND created_at <= date_add('2011-12-01', INTERVAL 7 DAY) 

這會選擇在201-12-01之間和之後7天創建的用戶。 進行更改，根據您的需要進行查詢。

Answer 3

SELECT * 
FROM `table` 
GROUP BY WEEK(ADDDATE(`date_column` , WEEKDAY(NOW())))