I have got this line
Declare #Startdate as Varchar(50)
Set #StartDate = dateadd(dd,-1,convert(datetime, convert(varchar, getdate(),101)))
This returns me
2014-05-19 00:00:00.000
Now I want to convert above to
20140519
Can someone please help.
Regards
How about this..
Declare #Startdate as Varchar(8)
Set #StartDate = CONVERT(VARCHAR(8), GETDATE()-1, 112)
SELECT #StartDate
RESULT: 20140519
t-sql's convert method lets you format dates in various ways.
112 looks like the style code you want.
Related
I have an sql DateTime (ms sql server) and want to extract the same date without the seconds:
e.g. 2011-11-22 12:14:58.000 to become: 2011-11-22 12:14:00.000
How can I do this? I was thinking to use DATEADD in combination with DATEPART but seems very error prone (besides performance issues)
SELECT DATEADD(MINUTE, DATEDIFF(MINUTE, 0, yourcolumn), 0) FROM yourtable
This will be effective, if you don't want a slow conversion between datatypes.
For a solution that truncates using strings try this:
SELECT CAST(CONVERT(CHAR(16), GetDate(),20) AS datetime)
CHAR(16) works only if our variable is converted to ODBC canonical format, as shown above by using 20 as the format specifier.
DECLARE #date DateTime = '2011 Nov 22 12:14:55';
SELECT CONVERT(Char(16), #date ,20) AS datetime
Results:
| datetime |
|------------------|
| 2011-11-22 12:14 |
Then you simply cast back to a DateTime type to continue using the value.
NOTE: This is only viable for data types that do not carry TimeZone info.
Also type conversions to VarChar and back are usually LESS performant than using DateTime functions that use numeric operations internally.
Consider other solutions posted if performance is a concern or if you must retain timezone information.
DECLARE #TheDate DATETIME
SET #TheDate = '2011-11-22 12:14:58.000'
DATEADD(mi, DATEDIFF(mi, 0, #TheDate), 0)
In queries
/* ...all records in that minute; index-friendly expression */
WHERE TheDate BETWEEN DATEADD(mi, DATEDIFF(mi, 0, #TheDate), 0)
AND DATEADD(mi, DATEDIFF(mi, 0, #TheDate) + 1, 0)
Date and time needs carefully and not being converted as TEXT.
My personal solution:
CREATE FUNCTION [dbo].[fnDateTimeTruncated]
(
#datetime DATETIME
)
RETURNS DATETIME
AS
BEGIN
RETURN DATETIMEFROMPARTS ( year(#datetime), month(#datetime), day(#datetime), DATEPART(hh,#datetime), DATEPART(mi,#datetime), 0, 0)
END
Edited:
Regarding http://blog.waynesheffield.com/wayne/archive/2012/03/truncate-a-date-time-to-different-part/, DateAdd has a better performance.
Thanks to t-clausen.dk
With a little fiddling around, this seems to work well:
SELECT CAST(CONVERT(CHAR(17), bl.[time],113) AS varchar(17))
Result given: 2011-11-22 12:14
The exact way I'm using it in my query as part of the selection list :
,CAST(CONVERT(CHAR(17), bl.[time],113) AS varchar(17))
+ ' (UTC +0)' AS [TIME]
Gives me the result: 15 Dec 2017 06:43 (UTC +0)
From SQL Server 2014, You can use Format function for this.
for Ex.
declare #Startdate datetime = '2020-11-07 15:27:50.713'
set #Startdate = Convert(datetime,FORMAT(#Startdate, 'yyyy-MM-dd HH:mm'))
> Result is
2020-11-07 15:27:00.000
If there is no milliseconds, than
DECLARE #dt datetime2 = '2011-11-22 12:14:58.000';
DECLARE #goalDt datetime2 = DATEADD(second,-DATEPART(second,#dt), #dt);
To remove a milliseconds part, add
SET #goalDt = DATEADD(millisecond,-DATEPART(millisecond,#goalDt ), goalDt dt);
To Round Off it:
DECLARE #TheDate DATETIME;
SET #TheDate = '2019-1-2 12:14:58.400';
SELECT CAST(#TheDate AS SMALLDATETIME);
To just Truncate:
DECLARE #TruncTheDate DATETIME;
SET #TruncTheDate = '2019-1-2 12:14:58.400';
SELECT DATEADD(mi, DATEDIFF(mi, 0, #TruncTheDate), 0);
select substring(cast(cast(getdate() as time(0)) as char(8)),0,6)
I have SchoolYear variable as an INT, and I'm trying to set a variable to this:
SET #BeginDate = '07/01/' + CONVERT(VARCHAR(4), #SchoolYear - 1)
It gives me the 'Error converting data type varchar to date' error.
Example:
#SchoolYear INT = 2019,
#BeginDate Date - NULL
Desired result:
07/01/2018
What am I doing wrong please?
Check out DATEFROMPARTS (available from SQL 2012), and bypass strings altogether.
SET #BeginDate = DATEFROMPARTS(#SchoolYear - 1, 1, 7)
1st arg = year, 2nd = month, 3rd = day.
The format you are using is simply not understood by your sql server.
When dealing with dates in varchar columns/variables it is best to use a date format that is language neutral.
yyyyMMdd is such a format, it will always work no matter what regional settings are used on your server.
See also this http://karaszi.com/the-ultimate-guide-to-the-datetime-datatypes
in your case you should use
SET #BeginDate = CONVERT(VARCHAR(4), #SchoolYear - 1) + '0107'
that is assuming that 01 is the month, and 07 is the day so you end up with 20180107
Better would be off course to avoid varchar complete when converting, like this
set #BeginDate = DATEFROMPARTS(#SchoolYear - 1, 1, 7)
Maybe you should use the yyyy-mm-dd format and change the set as:
SET #BeginDate = CONVERT(VARCHAR(4), #SchoolYear - 1)+ '-01-07'
Declare #SchoolYear int
Set #SchoolYear = 2019
Declare #BeginDate varchar(50)
SET #BeginDate = '07/01/' + CONVERT(VARCHAR(4), #SchoolYear - 1)
--Once You have you varchar populated, you can use Convert Function to convert
--to datetime and select the format you want
Select CONVERT (Datetime,#BeginDate, 101)
I'm wondering if anyone can help me?
I've got a table with two string columns that are technically dates (they are both formatted in the following way dd-mm-yyyy).
I need these to be in datetime format (specifically yyyy-mm-dd hh:mm:ss.mmm)
I've include a small screenshot of what the data looks like.
Any help here would be brilliant. I need this for work and we're all stumped!
I'm using SSMS
Try the below query
DECLARE #Date1 VARCHAR(50) = '31-01-2016'
SELECT CONVERT(datetime, #Date1, 103)
Here is a simple way
Declare #String varchar(25) = '17/02/2013'
Select convert(datetime, #String, 103)
Returns 2013-02-17 00:00:00.000
Ok to update your data and assuming you have a new DATETIME field to
Update YourTable set YourNewDateField = convert(datetime, YourDateStringField, 103)
I have an sql DateTime (ms sql server) and want to extract the same date without the seconds:
e.g. 2011-11-22 12:14:58.000 to become: 2011-11-22 12:14:00.000
How can I do this? I was thinking to use DATEADD in combination with DATEPART but seems very error prone (besides performance issues)
SELECT DATEADD(MINUTE, DATEDIFF(MINUTE, 0, yourcolumn), 0) FROM yourtable
This will be effective, if you don't want a slow conversion between datatypes.
For a solution that truncates using strings try this:
SELECT CAST(CONVERT(CHAR(16), GetDate(),20) AS datetime)
CHAR(16) works only if our variable is converted to ODBC canonical format, as shown above by using 20 as the format specifier.
DECLARE #date DateTime = '2011 Nov 22 12:14:55';
SELECT CONVERT(Char(16), #date ,20) AS datetime
Results:
| datetime |
|------------------|
| 2011-11-22 12:14 |
Then you simply cast back to a DateTime type to continue using the value.
NOTE: This is only viable for data types that do not carry TimeZone info.
Also type conversions to VarChar and back are usually LESS performant than using DateTime functions that use numeric operations internally.
Consider other solutions posted if performance is a concern or if you must retain timezone information.
DECLARE #TheDate DATETIME
SET #TheDate = '2011-11-22 12:14:58.000'
DATEADD(mi, DATEDIFF(mi, 0, #TheDate), 0)
In queries
/* ...all records in that minute; index-friendly expression */
WHERE TheDate BETWEEN DATEADD(mi, DATEDIFF(mi, 0, #TheDate), 0)
AND DATEADD(mi, DATEDIFF(mi, 0, #TheDate) + 1, 0)
Date and time needs carefully and not being converted as TEXT.
My personal solution:
CREATE FUNCTION [dbo].[fnDateTimeTruncated]
(
#datetime DATETIME
)
RETURNS DATETIME
AS
BEGIN
RETURN DATETIMEFROMPARTS ( year(#datetime), month(#datetime), day(#datetime), DATEPART(hh,#datetime), DATEPART(mi,#datetime), 0, 0)
END
Edited:
Regarding http://blog.waynesheffield.com/wayne/archive/2012/03/truncate-a-date-time-to-different-part/, DateAdd has a better performance.
Thanks to t-clausen.dk
With a little fiddling around, this seems to work well:
SELECT CAST(CONVERT(CHAR(17), bl.[time],113) AS varchar(17))
Result given: 2011-11-22 12:14
The exact way I'm using it in my query as part of the selection list :
,CAST(CONVERT(CHAR(17), bl.[time],113) AS varchar(17))
+ ' (UTC +0)' AS [TIME]
Gives me the result: 15 Dec 2017 06:43 (UTC +0)
From SQL Server 2014, You can use Format function for this.
for Ex.
declare #Startdate datetime = '2020-11-07 15:27:50.713'
set #Startdate = Convert(datetime,FORMAT(#Startdate, 'yyyy-MM-dd HH:mm'))
> Result is
2020-11-07 15:27:00.000
If there is no milliseconds, than
DECLARE #dt datetime2 = '2011-11-22 12:14:58.000';
DECLARE #goalDt datetime2 = DATEADD(second,-DATEPART(second,#dt), #dt);
To remove a milliseconds part, add
SET #goalDt = DATEADD(millisecond,-DATEPART(millisecond,#goalDt ), goalDt dt);
To Round Off it:
DECLARE #TheDate DATETIME;
SET #TheDate = '2019-1-2 12:14:58.400';
SELECT CAST(#TheDate AS SMALLDATETIME);
To just Truncate:
DECLARE #TruncTheDate DATETIME;
SET #TruncTheDate = '2019-1-2 12:14:58.400';
SELECT DATEADD(mi, DATEDIFF(mi, 0, #TruncTheDate), 0);
select substring(cast(cast(getdate() as time(0)) as char(8)),0,6)
Does anyone know how can I make change for existing date value in SQL Server into new value?
Example:
Declare #StartDate DATETIME; SET #StartDate = '2010-07-07 00:00:00'
Which I hope to declare another variable #DATETIME2 DATETIME based on #StartDate value changed into '2010-07-07 08:00:00' instead of default manually hard code it
Use the DateAdd() function:
DECLARE #DateTime2 DateTime; Set #DateTime2 = DATEADD(hh, 8, #StartDate)