Looking for the most efficient and elegant way to do truncate the time to the minute
-- I need to truncate the time to the minute,
-- this code almost works but rounds up
SELECT
CAST('2021-09-02T15:15:30.9233333' AS datetime2(7)) AS EventDatetime2,
CAST(CAST('2021-09-02T15:15:30.9233333' AS datetime2(7)) AS TIME(0)) AS EventTime
As Larnu posted, if you want to round up or down depending on the seconds value, a simple convert to smalldatetime will do.
If you want to truncate, there are several ways, the simplest is probably just to add minutes to midnight (only posting because I prefer without the magic dates like 1900-01-01):
DECLARE #dt datetime2(7) = '2021-09-02T15:15:30.9233333';
DECLARE #d datetime2(7) = CONVERT(date, #dt);
SELECT DATEADD(MINUTE, DATEDIFF(MINUTE, #d, #dt), #d);
Another way is more intuitive but a little ugly:
DECLARE #dt datetime2(7) = '2021-09-02T15:15:30.9233333';
SELECT SMALLDATETIMEFROMPARTS
(
DATEPART(YEAR, #dt),
DATEPART(MONTH, #dt),
DATEPART(DAY, #dt),
DATEPART(HOUR, #dt),
DATEPART(MINUTE, #dt)
);
If you want to "round" to the nearest minute you could just CONVERT the value to a smalldatetime; they are only accurate to 1 minute:
SELECT CONVERT(smalldatetime,CONVERT(datetime2,'2021-09-02T15:15:30.9233333'));
If you want to, you can then CONVERT back to your original data type.
If you want to truncate (so strip the minutes) you could use the old DATEDIFF and DATEADD method:
DECLARE #DateTime2 datetime2(7) = '2021-09-02T15:15:30.9233333';
SELECT DATEADD(MINUTE,DATEDIFF(MINUTE,'19000101',#DateTime2),CONVERT(datetime2(7),'19000101'));
Just another option using left() and the implicit conversion.
Depending on the actual USE CASE, the outer convert() is optional
Example
DECLARE #dt datetime2(7) = '2021-09-02T15:15:30.9233333';
select convert(smalldatetime,left(#dt,16))
Results
2021-09-02 15:15:00
Combining the DATEADD and CAST(... AS SMALLDATETIME) approaches effectively gives you a minute "floor", like so:
SELECT CAST('2021-09-02T15:15:30.9233333' AS DATETIME2(7)) AS EventDatetime2,
CAST(CAST('2021-09-02T15:15:30.9233333' AS DATETIME2(7)) AS TIME(0)) AS EventTime,
CAST(CAST(DATEADD(
SECOND,
(DATEPART(SECOND, CAST('2021-09-02T15:15:30.9233333' AS DATETIME2(7))) * -1),
CAST('2021-09-02T15:15:30.9233333' AS DATETIME2(7))) AS SMALLDATETIME) AS TIME(0));
EventDatetime2
EventTime
(No column name)
2021-09-02 15:15:30.9233333
15:15:31
15:15:00
The DATEADD in this example subtracts the number of seconds from the datetime before converting it to a smalldatetime, so when that cast/convert does its rounding it will always go to the lower minute.
If, however, your input value is the sort of string literal that the wording of your question implies, you could also do this:
SELECT CAST(SUBSTRING('2021-09-02T15:15:30.9233333', CHARINDEX('T', '2021-09-02T15:15:30.9233333')+1, 6) + '00' AS TIME(0));
and get this result:
15:15:00
Related
I'm stuck in finding an answer on how to convert:
07-DEC-18 01.00.54.984000 PM to 2018-12-07 13.00.54.984000
I think the time of 01.00.54 PM is 13hours , 0 minutes and 54 seconds
I have try to convert with 112 but still i can't find out how to cast or convert this.
Below is one method that converts the date and time portions separately, and then uses DATEADD to combine the results. This assumes the actual time precision is not greater than milliseconds. Note that you need to use datetime2 instead of datetime to avoid rounding to 1/300 milliseconds.
DECLARE #DateTimeString varchar(30) = '07-DEC-18 01.00.54.984000 PM';
SELECT DATEADD(
millisecond
, DATEDIFF(millisecond, '', CAST(REPLACE(SUBSTRING(#DateTimeString, 11, 8), '.', ':') + RIGHT(#DateTimeString, 10) AS time))
, CAST(LEFT(#DateTimeString, 9) AS datetime2)
);
This converts your value to the datatype it should be, a datetime2(6). Date and time datatypes don't have formats, if you're storing them in a particular format you're doing it wrong (as it means you're storing the value as a varchar).
DECLARE #YourDate varchar(30) = '07-DEC-18 01.00.54.984000 PM';
SELECT V.YD,
TRY_CONVERT(datetime2(6),F.FormatedYD,106)
FROM (VALUES(#YourDate)) V(YD)
CROSS APPLY (VALUES(STUFF(STUFF(V.YD,13,1,':'),16,1,':'))) F(FormatedYD);
If this was a table, then I would fix your actual column datatype by doing the following:
UPDATE YT
SET YourDateColumn = CONVERT(varchar(30),TRY_CONVERT(datetime2(6),F.FormatedYD,106),126)
FROM YourTable YT
CROSS APPLY (VALUES(STUFF(STUFF(YT.YourDateColumn,13,1,':'),16,1,':'))) F(FormatedYD);
ALTER TABLE YourTable ALTER COLUMN YourDateColumn datetime2(6);
I want to get date from yyyy-mm-dd to yyyy-mm-dd in SQL.
Example: I have two parameter #startdate : 2015-12-28 and #enddate : 2016-01-02, and database in SQLServer, datatype is varchar(10)
DATE_ORDER
28-12-2015
30-12-1996
29-12-2016
30-12-1997
24-12-2015
27-12-1993
03-01-2016
01-01-1992
02-01-2016
etc...
Ok,now I want to get data from #startdate : 2015-12-28 and #enddate : 2016-01-02. I use SELECT * FROM TABLE_X WHERE DATE_ORDER >= #startdate AND DATE_ORDER <= #enddate . But the results are not what I expected. Here are the results I want
28-12-2015
30-12-1996
29-12-2016
30-12-1997
01-01-1992
02-01-2016
I think to solve this problem, I need to do two things :
First, get date range from #startdate to #enddate , in here 28/12/2015, 29/12/2015, 30/12/2015, 31/12/2015, 01/01/2016, 02/01/2016.
The second: get the date in database same in range 28/12, 29/12, 30/12, 31/12, 01/01, 02/01, ignoring the year.
Can you give me some ideas about this ?
Your actual format is "105-italian" find details here.
You can convert your existing VARCHAR(10)-values with this line to real datetime
SELECT CONVERT(DATETIME,YourColumn,105)
Next thing to know is, that you should not use BETWEEN but rather >=StartDate AND < NakedDateOfTheFollowingDay to check date ranges
So to solve your need Get date-range from 2015-12-28 to 2016-01-02 you might do something like this:
DECLARE #Start DATETIME={d'2015-12-28'};
DECLARE #End DATETIME={d'2016-01-02'};
SELECT *
FROM YourTable
WHERE CONVERT(DATETIME,YourDateColumn,105)>=#Start AND CONVERT(DATETIME,YourDateColumn,105)<#End+1
Attention Be aware, that the conversion lets your expression be not sargable. No index will be used.
Better was to store your date as correctly typed data to avoid conversions...
Try this query
SET DATEFIRST 1
DECLARE #wk int SET #wk = 2
DECLARE #yr int SET #yr = 2011
--define start and end limits
DECLARE #todate datetime, #fromdate datetime
SELECT #fromdate = dateadd (week, #wk, dateadd (YEAR, #yr-1900, 0)) - 4 -
datepart(dw, dateadd (week, #wk, dateadd (YEAR, #yr-1900, 0)) - 4) + 1
SELECT #todate = #fromdate + 6
;WITH DateSequence( Date ) AS
(
SELECT #fromdate AS Date
UNION ALL
SELECT dateadd(DAY, 1, Date)
FROM DateSequence
WHERE Date < #todate
)
--select result
SELECT * FROM DateSequence OPTION (MaxRecursion 1000)
So, after the 2nd or 3rd edit, it slowly becomes clear, what you want (i hope).
So you REALLY WANT to get the dates with the year beeing ignored.
As someone pointed out already, date-values are stored internally not as string, but as internal datatype date (whatever that is in memory, i don't know).
If you want to compare DATES, you cannot do that with ignorance of any part. If you want to, you have to build a NEW date value of day and month of given row and a hard coded year (2000 or 1 or whatever) for EVERY row.
SELECT * FROM TABLE_X WHERE convert(date,'2000' + substring(convert(char(8),convert(datetime, 'DATE_ORDER', 105),112),5,4),112) >= #startdate AND convert(date,'2000' + substring(convert(char(8),convert(datetime, 'DATE_ORDER', 105),112),5,4),112) <= #enddate
If your startdate and enddate go OVER sylvester, you have to do 2 queries, on from startdate to 1231, one from 0101 to enddate.
I have made a function in SQL to calculate the Age from the Birthday and it is like this:
FUNCTION [dbo].[GetAge] (#birthday datetime, #date datetime)
RETURNS int
AS
BEGIN
return datediff(SECOND, #birthday, #date) / (365.23076923074 * 24 * 60 * 60)
END
The birthday is of format : 1963-01-01 00:00:00.000
My problem is that when I call the function like this :
SELECT dbo.GetAge(birthday, '2014-12-17 00:00:00')
FROM [dbo].[Users]
GO
it says:
Msg 535, Level 16, State 0, Line 3
The datediff function resulted in an overflow. The number of dateparts separating two date/time instances is too large. Try to use datediff with a less precise datepart.
BUT I call the same function with a date like :
SELECT dbo.GetAge(birthday, '1963-01-01 00:00:00')
FROM [dbo].[Users]
GO
I get the results..
So I don't understand what is the problem.
Pls help me and thank you in advance
The error says it all. "Try to use datediff with a less precise datepart"
return DATEDIFF(DAY, '1963-01-01 00:00:00', '2014-12-17 00:00:00') / (365.23076923074)
Seems obvious..the number of seconds from a user's birthday to today is too many for whatever datatype MySQL uses for DATEDIFF. But it's not too many from 1/1/1963.
Change your function to use a less precise datepart, i.e. minute instead of second.
FUNCTION [dbo].[GetAge] (#birthday datetime, #date datetime)
RETURNS int
AS
BEGIN
return datediff(MINUTE, #birthday, #date) / (365.23076923074 * 24 * 60)
END
OR hour
FUNCTION [dbo].[GetAge] (#birthday datetime, #date datetime)
RETURNS int
AS
BEGIN
return datediff(HOUR, #birthday, #date) / (365.23076923074 * 24)
END
OR DAY
FUNCTION [dbo].[GetAge] (#birthday datetime, #date datetime)
RETURNS int
AS
BEGIN
return datediff(DAY, #birthday, #date) / (365.23076923074)
END
Why not just DATEDIFF(year, #birthday, #date)? You only want the whole number of years, right?
Try casting your birthday to a date before sending it off.
SELECT dbo.GetAge(birthday, select cast('1963-01-01 00:00:00.000' as date))
FROM [dbo].[Users]
GO
I have a 'datetime' column with value 2013-03-22 15:19:02.000
I need to convert this value into epoch time and store it in a 'bigint' field
The actual epoch value for the above time is, 1363945741898, when I use
select DATEDIFF(s, '1970-01-01 00:00:00', '2013-03-22 15:19:02.000')
I get, 1363965542, when I use
select DATEDIFF(ms, '1970-01-01 00:00:00', '2013-03-22 15:19:02.000')
I get,
Msg 535, Level 16, State 0, Line 1
The datediff function resulted in an overflow. The number of dateparts separating two date/time instances is too large. Try to use datediff with a less precise datepart.
How to get the exact epoch value from the 'datetime' field
I use SQL Server 2008. Also this should work with 2005.
Here is an example, not tested, written from free hand :)
declare #v_Date datetime
set #v_Date = '2013-03-22 15:19:02.000'
declare #v_DiffInSeconds integer
declare #v_DiffInMSeconds bigint
select #v_DiffInSeconds = DATEDIFF(s, '1970-01-01 00:00:00', #v_Date)
select #v_DiffInMSeconds = cast(#v_DiffInSeconds as bigint) * 1000 + cast(DATEPART(ms, #v_Date) as bigint)
Edit
I have made this example below to illustrate the time zone conversion. The given time stamp (in seconds where I have removed the last three digits "898") is here converted to the local IST time zone by adding the 5.5 hours (19800 seconds) and I convert it back to the time stamp from local time to GMT again. Below calculations matches the values in the question (in seconds).
declare #v_time datetime
set #v_time = '1970-01-01 00:00:00'
declare #v_date datetime
set #v_date = '2013-03-22 15:19:01'
-- This returns "March, 22 2013 15:19:01"
select dateadd(s, (1363945741 + 19800), #v_time)
-- This returns "1363945741"
select datediff(s, #v_time, #v_date) - 19800
When tried to get exact milliseconds we get the overflow exception. we can get the values till seconds and multiply with 1000.
This is equivalent to new Date().getTime() in javascript:
Use the below statement to get the time in seconds.
SELECT cast(DATEDIFF(s, '1970-01-01 00:00:00.000', '2016-12-09 16:22:17.897' ) as bigint)
Use the below statement to get the time in milliseconds.
SELECT cast(DATEDIFF(s, '1970-01-01 00:00:00.000', '2016-12-09 16:22:17.897' ) as bigint) * 1000
convert epoch to human readable date time using below statement:
select DATEADD(s, 1481300537, '1970-01-01 00:00:00')
Epoch to datetime
create function [dbo].[EpochToDate](#Date bigint)
returns datetime
begin
return (select dateadd(s, #Date, '19700101'))
end
Use below code to get human readable date from epoch time
select DATEADD(s,convert(bigint,#date)/2, DATEADD(s, convert(bigint,#date)/2, '1970-01-01 00:00:00'))
What would be the sql for the following,
I have a date of birth in an int field,
ie YYYYMMDD = 19600518
I would like to get the age.
None of the other answers are actually calculating age. They're calculating the number of year boundaries and not taking the birthday into account.
To calculate the age, you'll need to do something like this:
DECLARE #d DATETIME
SET #d = CONVERT(DATETIME, CONVERT(VARCHAR(8), 19600518), 112)
SELECT DATEDIFF(year, #d, GETDATE())
- CASE WHEN DATEADD(year, DATEDIFF(year, #d, GETDATE()), #d) <= GETDATE()
THEN 0 ELSE 1 END AS Age
Most of the other answers are not calculating age - just whole years (e.g. Jan 1 2009 is one "year" after Dec 31 2008). Thus, if you use most of the calculations on this page, you will return an incorrect age for half of the year, on average. Luke is the only person who has seen this but his answer strikes me as too complicated - there is an easier way:
Select CAST(DATEDIFF(hh, [birthdate], GETDATE()) / 8766 AS int) AS Age
(NOTE: Thanks go to 'Learning' for making a great catch on my original algorithm - this is a revision that uses hours instead of days)
Because the rounding here is very granular, this is almost perfectly accurate for every day of every year. The exceptions are so convoluted that they are almost humorous: every fourth year the age returned will be one year too young if we A) ask for the age before 6:00 AM, B) on the person's birthday and C) their birthday is after February 28th. Of course, depending on what time someone was born this might 'technically' be correct! In my setting, this is a perfectly acceptable compromise.
Here is a loop that prints out ages to show that this works.
Declare #age int;
Declare #BirthDate datetime;
Declare #Year int;
Set #Year = 2008;
WHILE (#Year > 1930)
BEGIN
-- Put today's date where you see '-03-18'
SET #BirthDate = CAST(Cast(#Year as varchar(4)) + '-03-18' AS DATETIME)
SELECT #age=CAST(DATEDIFF(hh, #BirthDate, GETDATE()) / 8766 AS int);
Print Cast(#Year as varchar) + ' Age: ' + Cast(#age as varchar);
Set #Year = #Year - 1;
END;
Finally, this is the version that will also convert Paul's integer date to a real date:
CAST(DATEDIFF(hh, Convert(Datetime, Convert(varchar(8), [birthdate]), 112), GETDATE()) / 8766 AS int) AS Age
DECLARE #dateSt VARCHAR(8)
DECLARE #startDt DATETIME
-- Set the start date string
SET #dateSt = '19600518'
-- Make it a DATETIME (the ISO way)
SET #startDt = CAST(SUBSTRING(#dateSt, 1, 4) + '-' +
SUBSTRING(#dateSt, 5, 2) + '-' +
SUBSTRING(#dateSt, 7, 2) AS DATETIME)
-- Age in Days
SELECT DATEDIFF(D, #startDt, getdate())
Age in years :
select datediff(YY, convert(datetime, convert(varchar, 19600518)), getdate())
[EDIT]
-- I forgot to declare the variables
declare #birthday datetime;
set #birthday = convert(datetime,convert(varchar, 19600518), 112);
declare #datetoday datetime;
set #datetoday = getdate();
select
(
CASE
WHEN dateadd(year, datediff (year, #birthday, #datetoday), #birthday) <= #datetoday
THEN datediff (year, #birthday, #datetoday)
ELSE datediff (year, #birthday, #datetoday) - 1
END) as age;
Here's a one-liner way to do it:
CONVERT(DATETIME, CONVERT(VARCHAR(8),19600518), 112)
But beware! This relies on T-SQL, and probably won't work in other SQL environments.
Please note that the "style" of 112 is simply the "ISO" date format of yyyymmdd. (Something I found in some CONVERT documentation.)
This is a reason why you should NOT ever store dates as anything except a datetime datatype. The best fix is to change your datatype and convert all the dates once (wouldn't be surprised if there are few invalid ones in there either). then you never have to do these workarounds again.
I worked it out and got same as #Learning
select dob, datediff(year, convert(datetime, convert(varchar(8),[dob])) ,getdate()) as age
from [mytable]
where IsDate(convert(varchar(8),[dob])) = 1
NB. I needed the IsDate as well as there were some invalid dates in the data.
Edit. Here is an article from SQLServerCentral on calculating age.