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help-how to generate date backward from end to start


help-how to generate date backward from end to start

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midan1
midan1
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how to generate date backward from end to start
like this

begin
-- loop to insert date backward
while
@end_date>=@start_Date
begin
INSERT INTO @tb_temp


from middle of the month to end of the month
serial date
------------------------------
1 19/03/2008
2 18/03/2008
3 17/03/2007
..............
19 01/03/2007
tnx for any help



Roy Ernest
Roy Ernest
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I dont know if this is what you have in mind but You could use dateadd function to do that.


Create table #tbDate (id int identity, dt datetime)

declare @effectiveDate datetime
set @effectivedate = '2007-12-15 00:00:00.000'

While (@effectivedate > '2007-12-01')
begin
   Insert into #tbDate (dt)
   values ( @effectivedate )
   set @effectivedate = dateadd(d,-1,@effectivedate)
end

Select * from #tbDate


-Roy
Adam Haines
Adam Haines
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You could do something like this


declare @start datetime, @counter int, @end int
set @start = '1/1/2007'
set @end = datediff(dd,@start,getdate())
set @counter = 0

declare @tbl table(
   Dt SMALLDATETIME
)

while @counter <= @end
   begin
      INSERT INTO @tbl (Dt)
      Values(CONVERT(VARCHAR,dateadd(dd,-1 * @counter, GETDATE()),101))

      set @counter = @counter + 1
   end

select *
from @tbl





My blog: http://jahaines.blogspot.com
midan1
midan1
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tnx for the help
how can i use al, the help and put it in this part of code


while

@@Fetch_Status = 0

begin

-- loop to insert info of emp shifts

while

@current<=@EndDate ----------------generate date from END to START ?

begin

INSERT INTO @empShifts ([empID],[ShiftDate],[ShiftType],[StartDate] ,[EndDate])

select @input_empID ,@current,shift .patternShiftValue ,@StartDate,@EndDate

from @shifts_pattern as shift where PatternId=@last_shift_id+1






Matt Miller (#4)
Matt Miller (#4)
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skip the d*** loops. Use a numbers table to do this:


INSERT INTO @empShifts ([empID],[ShiftDate],[ShiftType],[StartDate] ,[EndDate])
select @input_empID ,
@current,
shift.patternShiftValue ,
@StartDate,
dateadd(day,-1*spt.number,@EndDate)
from @shifts_pattern as shift,
master..spt_values spt
where
PatternId=@last_shift_id+1
and spt.type='P'
and dateadd(day,-1*spt.number,@EndDate) between @current and @enddate




----------------------------------------------------------------------------------
Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?
Jeff Moden
Jeff Moden
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Thanks, Matt... you just saved me from having to breakout the Tally table "porkchops"! Tongue

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
     Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is usually not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
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Matt Miller (#4)
Matt Miller (#4)
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Not that it's much of a consolation, since the "outer code" is that of a cursor...

I just had to draw the line at second-order loops (loops of loops)..Smile

Baby steps.....

----------------------------------------------------------------------------------
Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?
midan1
midan1
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Matt Miller (1/16/2008)
skip the d*** loops. Use a numbers table to do this:


INSERT INTO @empShifts ([empID],[ShiftDate],[ShiftType],[StartDate] ,[EndDate])
select @input_empID ,
@current,
shift.patternShiftValue ,
@StartDate,
dateadd(day,-1*spt.number,@EndDate)
from @shifts_pattern as shift,
master..spt_values spt
where
PatternId=@last_shift_id+1
and spt.type='P'
and dateadd(day,-1*spt.number,@EndDate) between @current and @enddate




can you help me this is all my code


DECLARE

@shifts_pattern TABLE ([PatternId] [int] IDENTITY(1,1 ) NOT NULL, [patternShiftValue] [int]NOT NULL)

declare

@I int

set

@i=0

while

@i < 5

BEGIN

INSERT INTO @shifts_pattern ([patternShiftValue] )

SELECT 1 UNION ALL

SELECT 2 UNION ALL

SELECT 3 UNION ALL

SELECT 4 UNION ALL

SELECT 5 UNION ALL

SELECT 6 UNION ALL

SELECT 7 UNION ALL

SELECT 8

set

@i=@i+1

end

declare

@empList

TABLE

( [empID] [numeric](18, 0) NOT NULL,[ShiftType] [int]NULL,[StartDate][datetime]NOT NULL,[EndDate] [datetime] NOT NULL)

INSERT INTO

@empList ([empID], [ShiftType],[StartDate],[EndDate])

SELECT 111111,1,CONVERT(DATETIME, '01/01/2008', 103), CONVERT(DATETIME, '17/01/2008', 103)

-- create shifts table

declare

@empShifts

TABLE ( [empID] [numeric](18, 0) NOT NULL,[ShiftDate] [datetime]NOT NULL,[ShiftType] [int]NULL ,[StartDate] [datetime]NOT NULL,[EndDate] [datetime]NOT NULL)

DECLARE

@StartDate datetime

DECLARE

@EndDate datetime

Declare

@current datetime

DEclare

@last_shift_id int

Declare

@input_empID int

----------------- open list table for emp with curser

DECLARE

List_of_emp CURSOR FOR

SELECT

emp.empId,emp.ShiftType,emp.StartDate,emp.EndDate FROM @empList emp

OPEN

List_of_emp

FETCH

List_of_emp INTO @input_empID , @last_shift_id ,@StartDate,@EndDate

SET @current = @StartDate

-----------------

-- loop on all emp in the list

while

@@Fetch_Status = 0

begin

-- loop to insert info of emp shifts

while

@current<=@EndDate

begin

INSERT INTO @empShifts ([empID],[ShiftDate],[ShiftType],[StartDate] ,[EndDate])

select @input_empID ,@current,shift .patternShiftValue ,@StartDate,@EndDate

from @shifts_pattern as shift where PatternId=@last_shift_id+1

-- if it is Friday and we are on one of the first shift we don't move to next shift type .

if (DATENAME(dw ,@current) = 'Friday' ) and

EXISTS(select ShiftType from @empShifts where ShiftDate=@current and empID= @input_empID and ShiftType in ( 1,2,3))

-- do nothing

--set @last_shift_id=@last_shift_id

print ('friday first shift')

ELSE

set @last_shift_id=@last_shift_id+ 1

set @current=DATEADD( d,1, @current)

end

FETCH

List_of_emp INTO @input_empID ,@last_shift_id,@StartDate,@EndDate

-- init of start date for the next emp

set

@current = @StartDate

end

CLOSE

List_of_emp

DEALLOCATE

List_of_emp

select

empID,shiftDate,DATENAME (dw,shift.ShiftDate ), shiftType from @empShifts as shift

RETURN






Matt Miller (#4)
Matt Miller (#4)
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Try this

if object_ID('tempdb..#emplist','U')<>0
   Drop Table #emplist
if object_ID('tempdb..#empshifts','U')<>0
   Drop Table #empshifts
go
declare @g datetime
select @g=getdate()
CREATE table #empList    (
                  [empID] int NOT NULL,
                  [ShiftType] int NULL,
                  [StartDate] datetime NOT NULL,
                  [EndDate] datetime NOT NULL
                  Wink

INSERT INTO #empList ([empID], [ShiftType],[StartDate],[EndDate])
SELECT   111111,
      1,
      CONVERT(DATETIME, '01/01/2008', 103),
      CONVERT(DATETIME, '27/02/2009', 103)
UNION ALL
SELECT   222222,
      2,
      CONVERT(DATETIME, '01/01/2008', 103),
      CONVERT(DATETIME, '27/02/2009', 103)
UNION ALL
SELECT   333333,
      3,
      CONVERT(DATETIME, '01/01/2008', 103),
      CONVERT(DATETIME, '27/02/2009', 103)
UNION ALL
SELECT   444444,
      4,
      CONVERT(DATETIME, '01/01/2008', 103),
      CONVERT(DATETIME, '27/02/2009', 103)
UNION ALL
SELECT   555555,
      5,
      CONVERT(DATETIME, '01/01/2008', 103),
      CONVERT(DATETIME, '27/02/2009', 103)

-- create shifts table
CREATE table #empShifts    (
                     [empID] numeric(18, 0) NOT NULL,
                     [ShiftDate] datetime NOT NULL,
                     [ShiftType] int NULL ,
                     [startingShiftType] int not null
                     Wink
create unique clustered index uc_empshifts on #empshifts(empid,shiftdate)
declare @curr_employee int
declare @shift_id int
declare @dummyShift int
declare @dummyEmp int

--start by populating the dates into the @empshifts table
insert #empshifts   (
               empid,
               shiftdate,
               [startingShiftType]
               Wink
      select
               empid,
               dateadd(day,spt.number,startdate),
               shifttype
      from   #empList cross join
            master..spt_values spt
      where
         spt.type='P'
         and spt.number<=datediff(day, startdate,enddate)

--now set up the shifts as the cursor solution did
select @shift_id=0, @curr_employee=0

update e
   set
      @shift_ID=shiftType=(case when @curr_employee=empid then @shift_ID else startingShiftType end -1 +
               CASE WHEN @shift_id in ( 1,2,3) and DATENAME (dw,ShiftDate )='Friday' then 0 else 1 end)%8+1,
      @dummyshift=@shift_ID,
      @curr_employee =empid,
      @dummyemp=@curr_employee
from #empshifts e WITH (index(uc_empshifts),TABLOCK) OPTION (MAXDOP 1)

--show the results
select empid,shiftdate, DATENAME (dw,ShiftDate ),shifttype from #empshifts

select datediff(ms,@g,getdate())



----------------------------------------------------------------------------------
Your lack of planning does not constitute an emergency on my part...unless you're my manager...or a director and above...or a really loud-spoken end-user..All right - what was my emergency again?
midan1
midan1
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Matt Miller
i love you men BigGrinBigGrinBigGrinBigGrin
it working
you are genius !!
tnx
any recommendation for this code ?
i am look for solution over a month !!!
you make my day BigGrin



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