Sql query to generate monthly pay dates within a date range

问题

I want to generate monthly pay dates based on a given date and date range.Suppose I have selected "01/30/2016" as a starting pay date and date range is the year 2016.Then the pay dates will be (total days of month -1) th of other months throughout the year 2016. I have added a screenshot for the result set for the pay date "01/30/2016". I want to know the query in SQL.

Any help will be appreciated.

回答1:

You can as the below:

DECLARE @SelectedDate DATETIME = '2016.01.30'
SELECT
     DATEADD(DAY, -1 - (DAY(EOMONTH(@SelectedDate)) - DAY(@SelectedDate)),  DATEADD(MONTH, v.m, DATEFROMPARTS(YEAR(@SelectedDate), 1, 1)))   
FROM
    (VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12)) AS v(m)

How many days are left before the end of the month. The number of days found is removed from other months.

DAY(EOMONTH(@SelectedDate)(31) - DAY(@SelectedDate)(30) = left days(1)

Result:

2016-01-30
2016-02-28
2016-03-30
2016-04-29
2016-05-30
2016-06-29
2016-07-30
2016-08-30
2016-09-29
2016-10-30
2016-11-29
2016-12-30

回答2:

DECLARE @StartDate VARCHAR(10) = '01/30/2016',
        @EndDate   VARCHAR(10)='12/30/2016';

WITH _CTEDate( _date, _NextMonth)
     AS (SELECT CONVERT(DATE, @StartDate, 101),
                Eomonth(@StartDate, 1)
         UNION ALL
         SELECT Dateadd(DAY, -1, _NextMonth),
                Eomonth(Dateadd(M, 1, _date), 1)
         FROM   _CTEDate
         WHERE  _date < CONVERT(DATETIME, @EndDate, 101))
SELECT Datename(DW, _date)               [WeekDay],
       Cast(Day(_date) AS VARCHAR(2)) + ' '
       + Datename(MONTH, _date) + ' ' + ' '
       + Cast(Year(_date) AS VARCHAR(4)) AS [Date]
FROM   _CTEDate 

来源：https://stackoverflow.com/questions/40500746/sql-query-to-generate-monthly-pay-dates-within-a-date-range