one table of my database in sqlserver have a column with type of int for store dates.
for example fields are: 1105275802 or 1100330268.
I can convert it to datetime in php with this code:
(int)date('U',1100330268);
I want convert this integers to datetime in sqlserver. how can i do?
thanks for any help.
That might be difficult since MS SQL run's on Windows systems and date('U') is "Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT)". I suppose you could probably calculate the DateTime, but it could get messed up if you don't account for the timezone change between GMT and your local timezone.
select DateAdd(second, 1100330268, '1970-01-01')
Related
I am bit confusing here?
declare #date1 datetime = '2016-01-21 14:10:47.183'
I want to convert '2016-01-21 14:10:47.183' To '21-01-2016'
when I tried: select convert(date,#date1,105)
I am getting: 2016-01-21
But with: select convert(varchar(10),#date1,105)
I am getting: 21-01-2016
Why I am not having same results with above code?
Why should I convert to varchar?
Thanks in advance
This is just presentation matter and should be done in application layer. If you cannot do it in application you could use FORMAT (SQL Server 2012+):
declare #date1 datetime = '2016-01-21 14:10:47.183'
SELECT FORMAT(#date1, 'dd-mm-yyyy');
LiveDemo
Why I am not having same results with above code?
select convert(date,#date1,105)
-- DATETIME -> DATE
-- vs
select convert(varchar(10),#date1,105)
-- DATETIME -> VARCHAR(10) using specific style
If you only to skip time part use SELECT CAST(#date1 AS DATE) and do not bother how it is presented. It is still DATE.
To sum up: in SQL query use DATE as date, in application display it with desired format.
The reason why is because once you put a value in a datetime column (or date or any of the other variations on date-time datatypes) in SQL Server. SQL Server ceases to think of that date as having any particular format. It translates it into numbers, and stores it that way internally.
So when you select a date from a date time column, SQL Server displays it in the default format that you have selected based on your environment/local settings.
If you want to display it in any other format, you have to first convert it to a string, because as far as SQL Server is concerned, dates don't have formats. They are just numbers. The 21st day of March is the 21st day of March, whether you write it as 3/21 or 21/3.
So when you try to convert a date to a date with a different format, SQL Server just ignores you because dates don't have formats. However, if you want to convert that date to a string, SQL Server will be happy to help you display that string in any format you like.
Hope this helps, but sounds like some further research into how SQL Server stores dates would help your understanding.
I am casting DateTime field to Time by using CAST Syntax.
select CAST([time] as time) as [CSTTime]
DateTime
2015-03-19 00:00:00.000
Present Output : Time
03:05:36.0000000
I need only HH:MM:SS and not Milliseconds or 0000's
How to filter or Cast it to exact HH:MM:SS Format.
Time is not stored with its display format in SQL Server.
Therefore, from the user perspective, you can say that it has no format.
Of course, that's not completely accurate since it does have a storage format, but as an average user you can't really use it.
This is true for all date and time data types:
Date, DateTimeOffset, DateTime2, SmallDateTime, DateTime and Time.
If you need a format then you don't need to cast to time but to a char. Use Convert to get the char you need:
SELECT CONVERT(char(10), [time], 108) as CSTTime
Here is some background data if you're interested:
In this article published in 2000 the writer explains in depth how SQL Server treats dates and times. I doubt if anything significant changed between 2000 and 2015 in the way SQL Server stores date, time and datetime values internally.
Here are the relevant quotes, if you don't want to read all of it:
So how does SQL Server internally store the dates? It uses 8 bytes to store a datetime value—the first 4 for the date and the second 4 for the time. SQL Server can interpret both sets of 4 bytes as integers.
........
........
SQL Server stores the second integer for the time as the number of clock ticks after midnight. A second contains 300 ticks, so a tick equals 3.3 milliseconds (ms).
since time is actually stored as a 4 byte integer, it really doesn't have a format as an integral part of the data type.
You might also want to check out this article for a more detailed explanation with code samples.
You can achieve it with CAST just simple use TIME(0) datatype in following:
SELECT CAST('2015-03-19 01:05:06.289' AS TIME(0))
OUTPUT:
01:05:06
SQL Server 2008:
select cast(MyDate as time) [time] from yourtable
Earlier versions:
select convert(char(5), MyDate , 108) [time] from yourtable
Other Options:
SELECT CONVERT(VARCHAR(20), GETDATE(), 114)
The simplest way to get the time from datetime without millisecond stack is:
SELECT CONVERT(time(0),GETDATE())
Hour and Minute
SELECT substring(CONVERT(VARCHAR, GETDATE(), 108),0,6) AS Time
Have a scenario where I need to convert a NVARCHAR column containing time in hh:mm:ss format to a DateTime column for better filtering.
One of the dilemmas is that I don't really have a date, and as far as I know SQL does not have a Time datatype, but I can convert all to '1900-01-01' and append the time portion - I'm fine with this, I will just use the '1900-00-00' during my comparison.
The bigger issue is that the time data I'm converting has hour values going up to 27 hrs (according to them there's more then 24 hrs in a day). So there are values ie: 24:17, 26:25, etc..
To convert to datetime I'd have to do a little cleansing/string.replace first ie: 24:17 -> 00:17; 02:25, etc.
But before I dive in to that, any other more elegant way of dealing with this in SQL?
Using SQL Server 2014 Express .
I would like to know which format SQL Server saves datetimes, GMT or UMT?
The default DATETIME value in SQL Server has no knowledge of time zones and thus doesn't really care about time zones - that's entirely up to you to manage.
DECLARE #MyDate DATETIME
SET #MyDate = '20100922 04:05:06' --- no information on timezone
See MSDN docs on DATETIME.
With SQL Server 2008, a new data type was introduced called DATETIMEOFFSET which stores time along with a timezone offset. So here, you can store the local time and store the timezone that time is local to as well.
DECLARE #MyDateOffset DATETIMEOFFSET
SET #MyDateOffset = '20100922 04:05:06 +09:00' -- UTC plus 9 hours
Neither, it just returns the values in a specific format but stores it in a format without a timezone.
DECLARE #DateNow smalldatetime
SET #DateNow='12:30'
select #DateNow
-------------------------------------OR--------------------------------------
select CAST( '12:30' as datetime )
Result: 1900-01-01 12:30:00.000 (i don't want this)
But i need this result in time format not string not datetime?
Result: 12:30 (i want this)
Like José said, you can use CONVERT to display a datetime as date. MSDN has a list of all possible formats. For example format 8 is hh:mi:ss:
select convert(varchar(32),getdate(),8)
12:51:21
Now, you can cut the seconds off by specifying less characters:
select convert(varchar(5),getdate(),8)
12:51
Another often used format is 121, yyyy-mm-dd hh:mi:ss.mmm(24h):
select convert(varchar(32),getdate(),121)
2009-05-08 12:51:21.987
Where you can pick the time part like:
select substring(convert(varchar(32),getdate(),121),12,5)
12:51
Or to combine the string trickeries:
select right(convert(varchar(16),getdate(),121),5)
12:51
Right? Right!
There's a TIME type in SQL Server 2008, but in previous versions, you can represent it as a varchar for display.
This is how you can retrieve the time portion of a DATETIME field in the format you want.
DECLARE #DateNow smalldatetime
SET #DateNow = GETDATE() -- 2009-05-08 12:58:02.680
SELECT CONVERT(CHAR(5), #DateNow, 8)
-- this returns the time portion as 12:58
You can use the CONVERT function.
By the way, there's no "TIME" datatype in SQL Server. So, the converted result will always be a STRING.
EDIT: There's no "TIME" datatype in SQL Server versions < SQL Server 2008.
If you need to compare, add and/or subtract time (only) values, think about the possibility to use a INT to store the "TIME" value and then to CONVERT it to CHAR when displaying the result.