按周计算最近4周的记录

Question

我需要一个查询，允许我从MySQL表中选择最近4周的数据，但输出为从4周前的星期一开始的天数，而不管当周的当天。

DB有一个用户表，一个活动表，其FK为userID。 具有FK到activityID

的activityStats表

该查询将用于创建类似于：

的数组

$array = [
   "userid" => "userid",
   "dateAdded" => "dateAdded",
   "week1" => $array = [
      "monday" => $array = [
         "activityid" => "1",
         "time" => "21",
         ...
      ]
      "tuesday" => $array = [
         "activityid" => "2",
         "time" => "16",
         ...
      ]
      "wednesday" => $array = [
         "activityid" => "3",
         "time" => "16",
         ...
      ]
      ...
   "week2" => $array = [
      "monday" => $array = [
         "activityid" => "8",
         "time" => "21",
         ...
      ]
      "tuesday" => $array = [
         "activityid" => "9",
         "time" => "16",
         ...
      ]
      "wednesday" => $array = [
         "activityid" => "10",
         "time" => "16",
         ...
      ]
      ...
   ]
   ...
];

我可以创建多个查询，但这可能需要10周，或52周，而单独的查询可能不会削减它。

不知道从哪里开始。

Answer 1

假设您的时间戳列被称为timestamp，您可以：

SELECT CONCAT(YEAR(timestamp), '/', WEEK(timestamp)) AS week

然后检索特定范围，按周排序等。