I have the following query which is giving the last day of month by passing month name and year but dont know how to get first day in the similar fashion.
declare #month int, #year int
select #month=1,#year=2011
select Convert(varchar(20),dateadd(year,#year-1900,dateadd(month,#month,0)-1), 105)
I don't have experience with SQL Server, but based on your code, I would guess the answer would be something like:
declare #month int, #year int
select #month=1,#year=2011
select Convert(varchar(20),dateadd(year,#year-1900,dateadd(month,#month-1,0)), 105)
Keeping it in the datetime domain, find 1st day of following month and then subtract one day
SELECT
dateadd(day, -1, dateadd(year, #year-1900, dateadd(month, #month, 0)))
Almost anything with CAST or varchar is non-deterministic and isn't language/#DATEFORMAT safe
Related
I need to get date between two date range. That is nth day of nth month.
For example, I need to know 23rd day of every 2nd month between January 1, 2015 to December 30, 2015.
I need the query in T-SQL for SQL Server
You should use recursive query in MSSQL.
Here the first WITH DT is a table where you set up conditions:
WITH DT AS
(
SELECT CAST('January 1, 2015' as datetime) as dStart,
CAST('December 30, 2015' as datetime) as dFinish,
31 as nDay,
2 as nMonth
),
T AS
(
SELECT DATEADD(DAY,nDay-1,
DATEADD(MONTH, DATEDIFF(MONTH, 0, DStart), 0)
) as d,0 as MonthNumber
FROM DT
UNION ALL
SELECT DATEADD(DAY,nDay-1,
DATEADD(MONTH, DATEDIFF(MONTH, 0, DStart)
+T.MonthNumber+nMonth,0)
)as d, T.MonthNumber+nMonth as MonthNumber
FROM T,DT
WHERE DATEADD(DAY,nDay-1,
DATEADD(MONTH, DATEDIFF(MONTH, 0, DStart)
+T.MonthNumber+nMonth,0)
)<=DT.dFinish
)
SELECT d FROM T,DT WHERE DAY(d)=DT.nDay
SQLFiddle demo
Is this what you are trying to achieve?
DECLARE #startDate datetime
DECLARE #endDate datetime
DECLARE #monthToFind INT
DECLARE #dayToFind INT
SET #startDate = '01/01/2015'
SET #endDate = '12/31/2015'
SET #monthToFind = 2
SET #dayToFind = 20
IF MONTH(#startDate) + (#monthToFind - 1) BETWEEN MONTH(#startDate) AND MONTH(#endDate)
AND YEAR(#startDate) = YEAR(#endDate)
BEGIN
DECLARE #setTheDate datetime
SET #setTheDate = CAST(MONTH(#startDate) + (#monthToFind - 1) AS varchar) + '/' + CAST(#dayToFind AS varchar) + '/' + CAST(YEAR(#startDate) AS varchar)
SELECT DATENAME(DW,#setTheDate)
END
This is clearly homework, and the point of homework is to learn how things work and to solve problems, not to get others to do it for you. So - pointers for doing this properly, rather than an answer to copy and paste.
Numbers / tally tables are ideal for this sort of thing. Create a function that returns a list of sequential integers in a range. More general than a calendar table, and you can use it to derive a calendar table later if you need one.
When you've got that, DATEDIFF will give you the number of days between two dates. Use that to work out the size of your range, DATEADD to increment your date and possibly DATEPART to check that a date is the nth day of the month.
Mess about with those bits for a little while and you'll work it out.
Here is what I have tried thus far:
select CAST(
DATEPART(month,getDate())+'-'+
DATEPART(day,getDate())+'-'+
2012
as datetime)
I end up with the date: 1905-08-02 00:00:00.0. I was expecting to get today's date. I have rearranged the order and it doesn't seem to change. Can anyone offer as to why it gives me this? For the record, I plan to use other values than 2012 for the year.
Thanks in advance.
CAST() each piece as a varchar first:
select
cast(
cast(DATEPART(month,getDate()) as varchar(2))+'-'+
cast(DATEPART(day,getDate()) as varchar(2))+'-'+
'2012' as datetime)
select CAST ('2012'+
CAST(DATEPART(month,getDate()) as char(2))+
CAST(DATEPART(day,getDate()) as char(2))
as datetime)
You have to concatenate strings. Your code is casting the number 2039 to date.
If the goal with this little exercise is to be able to change the year of a given date you can do like this instead.
declare #NewYear int = 2003
-- with time part
select dateadd(year, #NewYear - year(getdate()), getdate())
-- time part removed
select dateadd(year, #NewYear - year(getdate()), dateadd(day, 0, datediff(day, 0, getdate())))
This code will work, you need to make sure that you are concatenating same data types and use convert with specific DateTime Format:
SELECT CONVERT(DATETIME,
CAST(DATEPART(month,getDate()) AS NVARCHAR(50))
+'-'+CAST(DATEPART(day,getDate()) AS NVARCHAR(50))
+'-2012'
,121)
I am working on an attendance software in asp.net, in it i have to make a report which will tell the user about the hours and everything...so far i have created the basic functionality of the system, i.e. the user can check in and check out...i am stuck at making the report...
I have to calculate the working hours for every month, so the user can compare his hours with the total hours...what i had in mind was to create a stored procedure which when given a month name and a year, returns an int containing working hours for that month....but i can seem to get at it....
so far i found out how to create a date from a given month and a date, and found out the last day of that month, using which i can find out the total days in month...now i cant seem to figure out how do i know how much days to subtract for getting the working days.
here's the so far code..
declare
#y int,
#m int,
#d int,
#date datetime
set #y = 2012
set #m = 01
set #d = 01
----To create the date first
select #date = dateadd(mm,(#y-1900)* 12 + #m - 1,0) + (#d-1)
----Last Day of that date
SELECT DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,#date)+1,0))
any help will be appreciated guys, thanks in advance....
The #theDate is any date on the month you want to calculate the work days. This approach does not take care about holidays.
DECLARE #theDate DATETIME = GETDATE()
SELECT MONTH(#theDate) [Month], 20 + COUNT(*) WorkDays
FROM (
SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, #theDate), 28) AS theDate
UNION
SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, #theDate), 29)
UNION
SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, #theDate), 30)
) AS d
WHERE DATEPART(DAY, theDate) > 28
AND DATEDIFF(DAY, 0, theDate) % 7 < 5
Here you can consider the below sql server code to get the first and
last day of the given month and also ignore all the Saturdays and Sundays.
DECLARE #curr_date datetime=getdate()
DECLARE #st_date datetime,#ed_date datetime
select #st_date=DATEADD(mm,datediff(mm,0,#curr_date),0),#ed_date = DATEADD(mm,datediff(mm,-1,#curr_date),-1)
--select #st_date as first_day,#ed_date as last_day
SET DATEFIRST 1 --Monday as first day of week
select DATEADD(dd,number,#st_date) from master..spt_values
where DATEDIFF(dd,DATEADD(dd,number,#st_date),#ed_date) >= 0 and type='P'
and DATEPART(DW,DATEADD(dd,number,#st_date)) <> 6
and DATEPART(DW,DATEADD(dd,number,#st_date)) <> 7
But inorder to calculate the actual working hours, you will have to take into the consideration of following thigs
1.Calculate the time interval between swipe-in and swipe-outs between start and end time for a day.
2.Exclude all the time gap(employee not in office)
3.Consider the company holidays.
etc
Here is a UDF to count work days. You can pass any date of a month to this function. But usually you should use actual "calendar" table to calculate work days and insert in this table weekends, holidays,... and so on.
CREATE FUNCTION dbo.WorkDaysCount (#Date datetime)
RETURNS int AS
BEGIN
DECLARE #BeginOfMonth datetime
SET #BeginOfMonth=DATEADD(DAY,-DAY(#Date)+1,#Date);
DECLARE #EndOfMonth datetime
SET #EndOfMonth=DATEADD(Day,-1,DATEADD(Month,1,#BeginOfMonth));
DECLARE #cDate datetime
set #cDate=#BeginOfMonth
Declare #WorkDaysCount int
SET #WorkDaysCount=0
while #cDate<=#EndOfMonth
begin
if DATEPART(dw,#cDate) not in (1,7) SET #WorkDaysCount=#WorkDaysCount+1 -- not a Sunday or Saturday change (1,7) to (6,7) if you have other week start day (Monday).
set #cDate=#cDate+1;
end;
return (#WorkDaysCount);
END
SELECT DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE())+1,0))
LastDay_CurrentMonth
Hi everyone I have a query to find the last day of current month, which is surely working well, but I am unable to understand it, because I have other similar requirements and have to change it accordingly.
Can somebody explain it to me..
Thanks in advance
Get the DateTime of Now
GETDATE() -- 2011-09-15 13:45:00.923
Calculate the difference in month's from '1900-01-01'
DATEDIFF(m, 0, GETDATE()) -- 1340
Add the difference to '1900-01-01' plus one extra month
DATEADD(m, DATEDIFF(m, 0, GETDATE())+1, 0) -- 2011-10-01 00:00:00.000
Remove one second
DATEADD(s, -1, DATEADD(m, DATEDIFF(m, 0, GETDATE())+1, 0)) -- 2011-09-30 23:59:59.000
This will give you the last day of current month but ignores time
select EOMONTH(GETDATE())
From Microsoft tech net
CREATE FUNCTION EOMONTH
(
#date datetime,
#months int
)
RETURNS datetime
AS
BEGIN
declare #eom datetime
declare #d datetime
set #d = dateadd(MONTH, #months, #date)
select #eom = dateadd(SECOND,-1,DATEADD(MONTH,datediff(MONTH,0,#d)+1,0))
RETURN #eom
END
GO
SELECT DATEPART (DD,EOMONTH(GETDATE())) AS 'the last day of the Current month'
Here DATEPART function is used to print the integer part of day.. if the the name of day is asked then we have to use DATENAME() function.
In query, last day means end of the month so we used EOMONTH() function.
GETDATE() is to represent current month.
Well this is my case: I have an input date X (dd-mm-yyyy), and I want to count the number of days between it with the year part is changed into current year and today's date in SQL. I t comes with the following condition, after the year is changed temporarily: (Here's my current idea of the logic)
- If date X is earlier than today, then difference = datediff(X,now), with the X year is current year
- If date X is later than today, then difference = datediff(X,now), with the X year is one year before
Sample case:
1st case: The input date is 6-6-1990. Today (automatically generated) is 22-8-2011. Then the difference will be = datediff(6-6-2011,22-08-2011)
2nd case: The input date is 10-10-1990. Today (automatically generated) is 22-8-2011. Then the difference will be = datediff(10-10-2010,22-08-2011)
Any idea how to do this in SQL (in SQL Server)? Or is there any other more simple alternatives for this problem? I'd also like this to be done in the query and not using a stored procedure or function
Sorry if there's already a similar question, I just don't know the exact keyword for this problem :( if there's a question like this previously, feel free to direct me there.
Thanks in advance
Here is the implementation (if I understood the logic you need correctly):
USE YourDbName
GO
CREATE FUNCTION YearPartDiff (#date datetime)
RETURNS int
AS
BEGIN
DECLARE #dateCurrentYear datetime
SET #dateCurrentYear = DATEADD(year, YEAR(GETDATE()) - YEAR(#date), #date)
DECLARE #result int
IF #dateCurrentYear < GETDATE()
SET #result = ABS(DATEDIFF(day, #dateCurrentYear, GETDATE()))
ELSE
SET #result = ABS(DATEDIFF(day, DATEADD(year, -1, #dateCurrentYear), GETDATE()))
RETURN(#result)
END
GO
And the example of usage:
USE YourDbName
GO
DECLARE #someDate datetime
SET #someDate = '2011-06-06'
SELECT dbo.YearPartDiff(#someDate) /*returns 77*/
SET #someDate = '2010-10-10'
SELECT dbo.YearPartDiff(#someDate) /*returns 316*/
Basically, #Andrei's solution, but in a single statement:
SELECT
DayDiff = DATEDIFF(
DAY,
DATEADD(YEAR, CASE WHEN LastOcc > GETDATE() THEN -1 ELSE 0 END, LastOcc),
GETDATE()
)
FROM (
SELECT LastOcc = DATEADD(YEAR, YEAR(GETDATE()) - YEAR(#InputDate), #InputDate)
) s
This seems to do the job
SELECT DATEDIFF(DAY, CONVERT(DATETIME, N'2011-06-06'), CONVERT(DATETIME, N'2011-08-22'))
So the basic syntax is
SELECT DATEDIFF(DAY, CONVERT(DATETIME, N'yyyy-mm-dd'), CONVERT(DATETIME, N'yyyy-mm-dd '))
Alternatively, you can use GETDATE() instead of the string for today's date
I have used "SELECT DATEDIFF( D, "+myDate+", GETDATE())" in my code, on SQL Server 2005. It works for me. The value myDate of course would be the DateTime input value.
you should try this query:
create table #T (inp_date datetime)
insert #T values ('06-06-1990')
insert #T values ('08-22-1990')
insert #T values ('10-10-1990')
--select * from #T
select inp_date, GETDATE(),
CASE
WHEN DATEADD(yy,DATEDIFF(yy,inp_date,GETDATE()),inp_date) <= GETDATE()
THEN DATEDIFF(dd,DATEADD(yy,DATEDIFF(yy,inp_date,GETDATE()),inp_date),GETDATE())
ELSE DATEDIFF(dd,DATEADD(yy,DATEDIFF(yy,inp_date,GETDATE())-1,inp_date),GETDATE())
END
from #T