Question

我有一项任务是创建T-SQL函数以添加12小时的当前日期和时间，但它不应包括任何假期/周末。

ALTER FUNCTION [dbo].[GetNextWorkingDay_Custom] (@givenDate DATETIME)
RETURNS DATE
AS
BEGIN
    DECLARE @StartDate DATETIME
    DECLARE @EndDate DATETIME
    DECLARE @DiffDate INT

    DECLARE @workingDate DATETIME
    IF (DATENAME(dw , @givenDate) = 'Friday')
    BEGIN
         SET @workingDate = DATEADD(day, 3, @givenDate)
    END
    ELSE IF (DATENAME(dw , @givenDate) = 'Saturday')
    BEGIN
         SET @workingDate = DATEADD(day, 2, @givenDate)
    END
    ELSE 
    BEGIN
         SET @workingDate = DATEADD(day, 1, @givenDate)
    END

    SELECT @StartDate = START_DATE
          ,@EndDate = END_DATE
          FROM special_time WHERE START_DATE = @workingDate AND IS_HOLIDAY = 1

    -- Select  count(*) from tblHolidays where holdate = @workingDate
    while ((select count(*) from special_time WHERE START_DATE = @workingDate AND IS_HOLIDAY = 1) > 0)
    begin

        set @DiffDate = DATEDIFF(day,@StartDate,@EndDate)
        set @workingDate = dateadd(dd,@DiffDate,@WorkingDate)
    end
    -- if adding a day makes it a Saturday, add 2 more to get to Monday (and test to make sure the week doesn't start with a holiday)
    IF (DATENAME(dw , @workingDate) = 'Saturday')
    BEGIN
         SET @workingDate = DATEADD(day, 2, @workingDate)
    END

    RETURN @workingDate
END

Answer 1

创建静态日期查找表（您可以通过Google找到许多指导，例如https://www.mssqltips.com/sqlservertip/4054/creating-a-date-dimension-or-calendar-table-in-sql-server/），然后添加一个表示该日期是工作日还是假日的列

您的功能就像：

select min(DateValue) as NextWorkingDay
from DatesLookupTable
where DateValue > @GivenDate
    and WorkingDay = 1

将当前日期添加到当前日期但不包括假日和周末

1 个答案: