व्यावसायिक घंटों और छुट्टियों का उपयोग करके नियत तारीख की गणना करना

आपको मान्य व्यावसायिक घंटों वाली तालिका की आवश्यकता है, जिसमें सप्ताहांत और छुट्टियों को शामिल नहीं किया गया है (या सप्ताहांत/छुट्टी के रूप में चिह्नित किया गया है ताकि आप उन्हें छोड़ सकें।) प्रत्येक पंक्ति एक दिन और उस दिन के काम के घंटों की संख्या का प्रतिनिधित्व करती है। फिर आप अपनी आरंभ तिथि से पहली (न्यूनतम) तिथि तक व्यावसायिक घंटे की तालिका को क्वेरी करते हैं, जहां चिह्नित सप्ताहांत/अवकाश पंक्तियों को छोड़कर योग (घंटे*60) आपके मिनट पैरामीटर से अधिक है। इससे आपको आपकी समाप्ति तिथि मिल जाती है।

ये रही दिन तालिका:

CREATE TABLE [dbo].[tblDay](
    [dt] [datetime] NOT NULL,
    [dayOfWk] [int] NULL,
    [dayOfWkInMo] [int] NULL,
    [isWeekend] [bit] NOT NULL,
    [holidayID] [int] NULL,
    [workingDayCount] [int] NULL,
 CONSTRAINT [PK_tblDay] PRIMARY KEY CLUSTERED 
(
    [dt] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

यहां बताया गया है कि मैं दिनों के साथ तालिका कैसे भरता हूं:

CREATE PROCEDURE [dbo].[usp_tblDay]
AS
BEGIN
    SET NOCOUNT ON;
    DECLARE  
        @Dt datetime ,
        @wkInMo int,
        @firstDwOfMo int,
        @holID int,
        @workDayCount int,
        @weekday int,
        @month int,
        @day int,
        @isWkEnd bit

    set @workDayCount = 0
    SET @Dt = CONVERT( datetime, '2008-01-01' ) 
    while @dt < '2020-01-01'
    begin
        delete from tblDay where dt = @dt

        set @weekday = datepart( weekday, @Dt )
        set @month = datepart(month,@dt)
        set @day = datepart(day,@dt)

        if @day = 1  -- 1st of mo
            begin
                set @wkInMo = 1
                set @firstDwOfMo = @weekday
            end

        if ((@weekday = 7) or (@weekday = 1)) 
            set @isWkEnd = 1 
        else 
            set @isWkEnd = 0

        if @isWkEnd = 0 and (@month = 1 and @day = 1) 
            set @holID=1        -- new years on workday
        else if @weekday= 6 and (@month = 12 and @day = 31) 
            set @holID=1        -- holiday on sat, change to fri
        else if @weekday= 2 and (@month = 1 and @day = 2) 
            set @holID=1        -- holiday on sun, change to mon

        else if @wkInMo = 3 and @weekday= 2 and @month = 1 
            set @holID = 2      -- mlk

        else if @wkInMo = 3 and @weekday= 2 and @month = 2 
            set @holID = 3      -- President’s

        else if @wkInMo = 4 and @weekday= 2 and @month = 5 and datepart(month,@dt+7) = 6
            set @holID = 4      -- memorial on 4th mon, no 5th
        else if @wkInMo = 5 and @weekday= 2 and @month = 5 
            set @holID = 4      -- memorial on 5th mon

        else if @isWkEnd = 0 and (@month = 7 and @day = 4) 
            set @holID=5        -- July 4 on workday
        else if @weekday= 6 and (@month = 7 and @day = 3) 
            set @holID=5        -- holiday on sat, change to fri
        else if @weekday= 2 and (@month = 7 and @day = 5) 
            set @holID=5        -- holiday on sun, change to mon

        else if @wkInMo = 1 and @weekday= 2 and @month = 9 
            set @holID = 6      -- Labor

        else if @isWkEnd = 0 and (@month = 11 and @day = 11) 
            set @holID=7        -- Vets day on workday
        else if @weekday= 6 and (@month = 11 and @day = 10) 
            set @holID=7        -- holiday on sat, change to fri
        else if @weekday= 2 and (@month = 11 and @day = 12) 
            set @holID=7        -- holiday on sun, change to mon

        else if @wkInMo = 4 and @weekday= 5 and @month = 11 
            set @holID = 8      -- thx

        else if @holID = 8
            set @holID = 9      -- dy after thx

        else if @isWkEnd = 0 and (@month = 12 and @day = 25) 
            set @holID=10       -- xmas day on workday
        else if @weekday= 6 and (@month = 12 and @day = 24) 
            set @holID=10       -- holiday on sat, change to fri
        else if @weekday= 2 and (@month = 12 and @day = 26) 
            set @holID=10       -- holiday on sun, change to mon
        else
            set @holID = null

        insert into tblDay select @dt,@weekday,@wkInMo,@isWkEnd,@holID,@workDayCount

        if @isWkEnd=0 and @holID is null 
            set @workDayCount = @workDayCount + 1

        set @dt = @dt + 1
        if datepart( weekday, @Dt ) = @firstDwOfMo 
            set @wkInMo = @wkInMo + 1
    end
END

मेरे पास एक हॉलिडे टेबल भी है, लेकिन सभी की छुट्टियाँ अलग हैं:

holidayID   holiday rule description
1   New Year's Day  Jan. 1
2   Martin Luther King Day  third Mon. in Jan.
3   Presidents' Day third Mon. in Feb.
4   Memorial Day    last Mon. in May
5   Independence Day    4-Jul
6   Labor Day   first Mon. in Sept
7   Veterans' Day   Nov. 11
8   Thanksgiving    fourth Thurs. in Nov.
9   Fri after Thanksgiving  Friday after Thanksgiving
10  Christmas Day   Dec. 25

एचटीएच