上個月每周的數據

Question

我想按周對上個月的數據進行排序，並尋找無需手動編寫日期即可自動使用的代碼。

而不是這個：

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'

我試過這個：

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'

但結果卻大相徑庭。 第一周的值在第二周，第二周的值在第三周，依此類推..所有周都以某種方式移動...此外，第一周（MA1）被標記為 NULL 但他的值應該是 go 到上周(MA5)。

另外，我找到了這個，但它會將幾周計為一個，但隨着時間的推移，它與 rigt 周相匹配，所以也許在 11 月 1 日會很好，但我寧願需要一些能在一個月內隨時顯示數據的東西.

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

Answer 1

作為解決方案之一，您可以在您的數據庫或臨時表中使用您的時間段范圍創建 TimeTable，然后生成列 WeekOfMonth：
1. 至少用這些列創建表（日期、年、月、周、季度：使用DATEPART ）
2.生成你的專欄：

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

如果您創建了一個好的時間表，它將對未來的任務很有用。

Answer 2

試試下面的（部分）查詢，評論是內聯的：

-- set monday as first day of week
set datefirst 1;

-- after checking, that 1 of september is 35th week of year, you can do the following:
select case when datepart(week, wadat_ist) = 35 then 'MA1'
            when datepart(week, wadat_ist) = 36 then 'MA2'
            when datepart(week, wadat_ist) = 37 then 'MA3'
            when datepart(week, wadat_ist) = 38 then 'MA4'
            when datepart(week, wadat_ist) = 39 then 'MA5'
       end as 'Activity'

或更短

select case datepart(week, wadat_ist) 
            when 35 then 'MA1'
            when 36 then 'MA2'
            when 37 then 'MA3'
            when 38 then 'MA4'
            when 39 then 'MA5'
       end as 'Activity'