增量週數在SQL Server

我試圖增加一週號碼，以便在今年的週數將不重複增量週數在SQL Server

例如18/12/2016爲週數51，25/12/2016爲一週編號52和01/01/2017是周編號1，08/01/2017是周編號2。

我想要的是2016年12月18日week NO 51，25/12/2016 week No 52，week 53號，2017年8月1日一週號54等，以便沒有周將重複

見我的數據集和查詢的樣本我已經試過

DECLARE @Table1 table (Week_End_Date DATE) 

INSERT INTO @Table1 
VALUES ('2016-04-03'), ('2016-04-10'), ('2016-04-17'), ('2016-04-24'), 
     ('2016-05-01'), ('2016-05-08'), ('2016-05-15'), ('2016-05-22'), 
     ('2016-05-29'), ('2016-06-05'), ('2016-06-12'), ('2016-06-19'), 
     ('2016-06-26'), ('2016-07-03'), ('2016-07-10'), ('2016-07-17'), 
     ('2016-07-24'), ('2016-07-31'), ('2016-08-07'), ('2016-08-14'), 
     ('2016-08-21'), ('2016-08-28'), ('2016-09-04'), ('2016-09-11'), 
     ('2016-09-18'), ('2016-09-25'), ('2016-10-02'), ('2016-10-09'), 
     ('2016-10-16'), ('2016-10-23'), ('2016-10-30'), ('2016-11-06'), 
     ('2016-11-13'), ('2016-11-20'), ('2016-11-27'), ('2016-12-04'), 
     ('2016-12-11'), ('2016-12-18'), ('2016-12-25'), ('2017-01-01'), 
     ('2017-01-08'), ('2017-01-15'), ('2017-01-22'), ('2017-01-29'), 
     ('2017-02-05'), ('2017-02-12'), ('2017-02-19'), ('2017-02-26'), 
     ('2017-03-05'), ('2017-03-12'), ('2017-03-19'), ('2017-03-26'), 
     ('2017-04-02'), ('2017-04-09'), ('2017-04-16'), ('2017-04-23'), 
     ('2017-04-30'), ('2017-05-07'), ('2017-05-14'), ('2017-05-21'), 
     ('2017-05-28'), ('2017-06-04'), ('2017-06-11'), ('2017-06-18'), 
     ('2017-06-25'), ('2017-07-02'), ('2017-07-09'), ('2017-07-16'), 
     ('2017-07-23'), ('2017-07-30'), ('2017-08-06'), ('2017-08-13'), 
     ('2017-08-20'), ('2017-08-27'), ('2017-09-03'), ('2017-09-10'), 
     ('2017-09-17'), ('2017-09-24'), ('2017-10-01'), ('2017-10-08'), 
     ('2017-10-15'), ('2017-10-22'), ('2017-10-29'), ('2017-11-05'), 
     ('2017-11-12'), ('2017-11-19'), ('2017-11-26'), ('2017-12-03'), 
     ('2017-12-10'), ('2017-12-17'), ('2017-12-24'), ('2017-12-31'), 
     ('2018-01-07'), ('2018-01-14'), ('2018-01-21'), ('2018-01-28'), 
     ('2018-02-04'), ('2018-02-11'), ('2018-02-18'), ('2018-02-25'), 
     ('2018-03-04'), ('2018-03-11'), ('2018-03-18'), ('2018-03-25'), 
     ('2018-04-01')

查詢：

SELECT 
    Week_End_Date, 
    DATEPART(WEEK,Week_End_Date) AS WeekNumber, 
    REPLACE(LEFT(Week_End_Date,7),'-','') + 
     CASE 
      WHEN CAST(DATEPART(WEEK, Week_End_Date) AS VARCHAR(2)) IN ('1', '2', '3', '4', '5', '6', '7', '8', '9') 
       THEN '0' + CAST(DATEPART(WEEK, Week_End_Date) AS VARCHAR(2)) 
       ELSE CAST(DATEPART(WEEK, Week_End_Date) AS VARCHAR(2)) 
     END Wk_NO_Norepeat 
FROM 
    @Table1 
ORDER BY 
    Week_End_Date

所需的輸出

Date Current week number Expected output 
04/12/2016 49 49 
11/12/2016 50 50 
18/12/2016 51 51 
25/12/2016 52 52 
01/01/2017 1 53 
08/01/2017 2 54 
15/01/2017 3 55 
22/01/2017 4 56 
29/01/2017 5 57

來源

2017-04-06 JonWay

您可以使用ROW_NUMBER（）。如果我理解正確，你可以使用類似的東西：

DECLARE @Table1 table (Week_End_Date DATE) 

INSERT INTO @Table1 
VALUES ('2016-04-03'), ('2016-04-10'), ('2016-04-17'), ('2016-04-24'), 
     ('2016-05-01'), ('2016-05-08'), ('2016-05-15'), ('2016-05-22'), 
     ('2016-05-29'), ('2016-06-05'), ('2016-06-12'), ('2016-06-19'), 
     ('2016-06-26'), ('2016-07-03'), ('2016-07-10'), ('2016-07-17'), 
     ('2016-07-24'), ('2016-07-31'), ('2016-08-07'), ('2016-08-14'), 
     ('2016-08-21'), ('2016-08-28'), ('2016-09-04'), ('2016-09-11'), 
     ('2016-09-18'), ('2016-09-25'), ('2016-10-02'), ('2016-10-09'), 
     ('2016-10-16'), ('2016-10-23'), ('2016-10-30'), ('2016-11-06'), 
     ('2016-11-13'), ('2016-11-20'), ('2016-11-27'), ('2016-12-04'), 
     ('2016-12-11'), ('2016-12-18'), ('2016-12-25'), ('2017-01-01'), 
     ('2017-01-08'), ('2017-01-15'), ('2017-01-22'), ('2017-01-29'), 
     ('2017-02-05'), ('2017-02-12'), ('2017-02-19'), ('2017-02-26'), 
     ('2017-03-05'), ('2017-03-12'), ('2017-03-19'), ('2017-03-26'), 
     ('2017-04-02'), ('2017-04-09'), ('2017-04-16'), ('2017-04-23'), 
     ('2017-04-30'), ('2017-05-07'), ('2017-05-14'), ('2017-05-21'), 
     ('2017-05-28'), ('2017-06-04'), ('2017-06-11'), ('2017-06-18'), 
     ('2017-06-25'), ('2017-07-02'), ('2017-07-09'), ('2017-07-16'), 
     ('2017-07-23'), ('2017-07-30'), ('2017-08-06'), ('2017-08-13'), 
     ('2017-08-20'), ('2017-08-27'), ('2017-09-03'), ('2017-09-10'), 
     ('2017-09-17'), ('2017-09-24'), ('2017-10-01'), ('2017-10-08'), 
     ('2017-10-15'), ('2017-10-22'), ('2017-10-29'), ('2017-11-05'), 
     ('2017-11-12'), ('2017-11-19'), ('2017-11-26'), ('2017-12-03'), 
     ('2017-12-10'), ('2017-12-17'), ('2017-12-24'), ('2017-12-31'), 
     ('2018-01-07'), ('2018-01-14'), ('2018-01-21'), ('2018-01-28'), 
     ('2018-02-04'), ('2018-02-11'), ('2018-02-18'), ('2018-02-25'), 
     ('2018-03-04'), ('2018-03-11'), ('2018-03-18'), ('2018-03-25'), 
     ('2018-04-01') 

DECLARE @FirstWeek INT = (SELECT DATEPART(WEEK,MIN(Week_End_Date))-1 FROM @Table1) 

SELECT 
    Week_End_Date, 
    ROW_NUMBER() OVER (ORDER BY Week_End_Date)[email protected] AS WeekNumber 
FROM 
    @Table1

來源

2017-04-06 13:20:48 Matej

這或許你想要做什麼：

select t1.weekenddate, datepart(week, t1.weekenddate) AS WeekNumber, 
     (first_value(datepart(week, t1.weekenddate)) over (order by t1.weekenddate) + 
     row_number() over (order by t1.weekenddate) - 1 
     ) as newweeknumber 
from @table1 t1;

它計算在數據的第一週數，然後就遞增在隨後的行中將星期數減1。

來源

2017-04-06 11:35:41

增量週數在SQL Server

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