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sql - 上个月每周的数据

问题描述

我想按周对上个月的数据进行排序，并寻找无需手动编写日期即可自动使用的代码。

而不是这个：

SELECT
wadat_ist AS 'frame'
,CASE
WHEN wadat_ist BETWEEN '2019-09-01' AND '2019-09-01' THEN 'MA1'
WHEN wadat_ist BETWEEN '2019-09-02' AND '2019-09-08' THEN 'MA2'
WHEN wadat_ist BETWEEN '2019-09-09' AND '2019-09-15' THEN 'MA3'
WHEN wadat_ist BETWEEN '2019-09-16' AND '2019-09-22' THEN 'MA4'
WHEN wadat_ist BETWEEN '2019-09-23' AND '2019-09-30' THEN 'MA5'
END AS 'Activity'

我试过这个：

SELECT
wadat_ist AS 'frame'
,CASE
WHEN wadat_ist BETWEEN (SELECT (Convert (DATETIME, (SELECT DATEADD(DAY,1,EOMONTH(GETDATE(),-2)))))) AND  (SELECT DateAdd (wk, 0, (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, +0.99999)))) THEN 'MA1'
WHEN wadat_ist BETWEEN (SELECT DateAdd (wk, -4, (SELECT DATEADD(day,-1,DATEadd(MONTH,datediff(month,0,GETDATE()),0))))) AND (SELECT DateAdd (wk, 1, (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0)))) THEN 'MA2'
WHEN wadat_ist BETWEEN (SELECT DateAdd (wk, -3, (SELECT DATEADD(day,-1,DATEadd(MONTH,datediff(month,0,GETDATE()),0))))) AND (SELECT DateAdd (wk, 2, (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0)))) THEN 'MA3'
WHEN wadat_ist BETWEEN (SELECT DateAdd (wk, -2, (SELECT DATEADD(day,-1,DATEadd(MONTH,datediff(month,0,GETDATE()),0))))) AND (SELECT DateAdd (wk, 3, (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0)))) THEN 'MA4'
WHEN wadat_ist BETWEEN (SELECT DateAdd (wk, -1, (SELECT DATEADD(day,-1,DATEadd(MONTH,datediff(month,0,GETDATE()),0))))) AND (SELECT DateAdd (wk, 4, (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0)))) THEN 'MA5'
END AS 'Activity'

但结果却大相径庭。第一周的值在第二周，第二周的值在第三周，依此类推..所有周都以某种方式移动...此外，第一周（MA1）被标记为NULL，但他的值应该去上周(MA5)。

另外，我找到了这个，但它会将几周计为一个，但随着时间的推移，它与 rigt 周相匹配，所以也许在 11 月 1 日会很好，但我宁愿需要一些能在一个月内随时显示数据的东西.

WHEN wadat_ist BETWEEN (select DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE())-1, 0)) AND (select dateadd(wk, datediff(wk, 5, getdate()) - 5, 6)) THEN 'MA1'
WHEN wadat_ist BETWEEN (select dateadd(wk, datediff(wk, 4, getdate()) - 4, 0)) AND (select dateadd(wk, datediff(wk, 4, getdate()) - 4, 6)) THEN 'MA2'
WHEN wadat_ist BETWEEN (select dateadd(wk, datediff(wk, 3, getdate()) - 3, 0)) AND (select dateadd(wk, datediff(wk, 3, getdate()) - 3, 6)) THEN 'MA3'
WHEN wadat_ist BETWEEN (select dateadd(wk, datediff(wk, 2, getdate()) - 2, 0)) AND (select dateadd(wk, datediff(wk, 2, getdate()) - 2, 6)) THEN 'MA4'
WHEN wadat_ist BETWEEN (select dateadd(wk, datediff(wk, 1, getdate()) - 1, 0)) AND (SELECT EOMONTH(getdate(),-1)) THEN 'MA5'

使用 T-SQL

标签： sqlsql-servertsql

解决方案

作为解决方案之一，您可以在您的数据库或临时表中使用您的时间段范围创建时间表，然后生成列 WeekOfMonth：
1. 至少使用这些列创建表（日期、年、月、周、季度：使用DATEPART）
2.生成你的专栏：

WeekOfMonth = DENSE_RANK() OVER (PARTITION BY [year], [month] ORDER BY [week])



如果您创建了一个好的时间表，它将对未来的任务很有用。

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