Sql 如何合并同一列中具有相同数据的多行？

我的密码是：

SELECT datepart(year, request_created_date) AS request_year,
    datepart(month, request_created_date) AS request_month,
    datepart(week, request_created_date) AS request_week,
    count(request_id) AS request_count
FROM nyc311_requests
GROUP BY request_created_date
ORDER BY request_week

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在我得到的输出中，我有两行，其中request_week为36，还有7行，其中request_week为37。我想要的是将这样的列合并成一行

如果要使用GROUP BY子句，则必须包括GROUP BY中除计算字段以外的所有字段：

SELECT datepart(year, request_created_date) AS request_year,
    datepart(month, request_created_date) AS request_month,
    datepart(week, request_created_date) AS request_week,
    count(request_id) AS request_count
FROM nyc311_requests
GROUP BY datepart(year, request_created_date),
    datepart(month, request_created_date),
    datepart(week, request_created_date)
ORDER BY request_week

或者，如果您想要一个更干净的查询：

SELECT M.*, count(*) AS request_count FROM 
(
  SELECT datepart(year, request_created_date) AS request_year,
         datepart(month, request_created_date) AS request_month,
         datepart(week, request_created_date) AS request_week
  FROM nyc311_requests
)AS M
GROUP BY M.request_year, M.request_month, M.request_week
ORDER BY M.request_week

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您是否尝试过将分组依据更改为

GROUP BY datepart（周，请求创建日期）

是的，但我收到一个错误消息，说请求创建日期无效，因为它不是聚合或在GROUP BY子句中。以下情况如何：

GROUP BY datepart（年，请求创建日期），datepart（月，请求创建日期），datepart（周，请求创建日期）