When I update a column from a table with a date format of MMM DD,YYYY to a new format. The format doesn't change to the desired format which is YYYY-MM-DD HH:MM:SS. Even when update different value like GETDATE(). The date will change but the format will remain the same.
Current value & format from column the type is varchar
DueDate
Jun 27 2020 12:00AM
Desired format
DueDate
2020-06-27 00:00:00.000
Update statement
update TableName
set
DueDate = CAST([DueDate] AS smalldatetime),
LastSyncDateTime = GETDATE()
where CaseGuid = 'DA2CE6A1-0394-463E-8E8D-962F3A24ADC8'
There is a huge confusion between "Date displaying format" and "Date storing format". The VERY short explanation is that what you mentioned is only a client side displaying format, while SQL Server have specific format which is used for storing dates (remember that the server stores zero and one only).
You can insert dates to a table using different styles (the official name for the displaying format is STYLE), and you can present the dates in the client side using different style, but it will always be stored the same from the "SQL Server point of view" according to the DATE type which is used.
In order to solve your original needs, all that you needed to do is to provide the server the information about the style which you use in the client side (in the query). This is done by using explicit CONVERT with the third parameter, which is the STYLE.
For example if you use in the client side an Israeli format like dd/MM/yyyy, then you should use CONVERT(DATE, '27/02/2021', 103).
For more information on different STYLEs you can check this documentation.
Note: If you want to display the dates in specific format which is not covered by the existing STYLEs then you can use the function FORMAT() in your query. This function is fully flexible to return the data in your specific format. Remember that this function returns the data as string and it will not be date anymore.
For example, let's say that I want to use the format: "Day:dd,Month:MM,Year:yyyy". So if the date is '27/02/2021' then I expect to get "Day:27,Month:02,Year:2021". In this case use below:
DECLARE #D DATE
SET #D = CONVERT(DATE, '27/02/2021', 103) -- convert string to date for storing
select FORMAT(#D, 'Day:dd, Month:MM, Year:yyyy') -- convert date to string for displaying
Solution use the format function
update TableName
set
DueDate = FORMAT (CAST([DueDate] AS smalldatetime),'yyyy-MM-dd HH:mm:ss'),
LastSyncDateTime = GETDATE()
where CaseGuid = 'DA2CE6A1-0394-463E-8E8D-962F3A24ADC8'
https://www.sqlshack.com/a-comprehensive-guide-to-the-sql-format-function/
Related
I have over 65 columns among which there are about 30 Date Columnns. I want to set it to MM/DD/YYYY. Presently it is also showing the time YYYY-MM-DD hh:mm:ss. I tried correcting this within the SQL query by using cast. The SQL output shows only date, but it again gets represented in DateTime in SSRS. I dont want to right click on 30 columns manually to set date format. Is there a way to set default date format for all date columns in the report?
"Cast" is not helping here since it is about types, not format.
Try using the "convert" function instead.
In your case, it would be
-- use your field name instead of sysdatetime()
select convert(varchar, sysdatetime(), 101/*mm/dd/yyyy format Id*/);
You should be able to select all the fields in the tablix and change the formatting together. You may wish to consider using a parameter for the formatting.
I have a column in my table with Dates in the format yyyy-mm-dd I want to convert all the dates in that column to the format mm/dd/yyyy
I am using the below query
UPDATE Test.dbo.Status
SET DateIn = CONVERT(DATE,DateIn ,101)
The DateIn column is defined as Date in my table (DateIn DATE NULL)
The query does no change to the data. am I doing some thing wrong here?
You can change the default format in which SQL Server displays a date, but you can't alter the way a DATE value is stored via CONVERT(). You can format a date however you want if you store it as a string, but you lose functionality when you do that and it's not advisable. If you are hell-bent on storing a formatted version, you might want to create a new VARCHAR() field so you can preserve your DATE version.
You're better off formatting the date at the application level.
The reason your query does nothing is that the actual DATE values are equivalent. Notice when you take any valid date format and CAST() it as DATE the resulting format is the same regardless of the input:
SELECT CAST('20040510' AS DATE)
SELECT CAST('2004-05-10' AS DATE)
SELECT CAST('May 10, 2004' AS DATE)
All return: 2004-05-10 on my instance of SQL Server.
May I know could I verify whether the date displayed in the field is in specific format
As per my requirement, the datetime should be displayed in format 'yyyy/mm/dd HH(24hr)/MM/SS'
Eg: The valid value should be '2014/07/18 14:16:48'. If the date is displayed as '18/07/2014 14:16:48', then it is invalid.
Using query how I verify whether it is shown in the format which I have expected. I could use IsDate option to verify it is a valid date and also I could use Mid function to verify the date separator which is '/', but how could I verify the format.
Thanks
If the column is stored as Text, use the SQL Like operator. Select valid dates:
SELECT * FROM myTable WHERE myDate Like "####/##/## ##:##:##"
Select invalid dates
SELECT * FROM myTable WHERE myDate Not Like "####/##/## ##:##:##"
# stands for a single digit.
See Like Operator.
But note that this only makes sense if myDate is a Text! If the type of myDate is Date/Time, the date is stored in a numeric format internally and is only formatted as a date for display. So don't confuse the date value per se and the date as it is displayed.
A Date/Time is always stored in the same way, no matter how it is formatted and displayed!
All you need to do is to open the Table in Design View and to set the Format property.
How do I check if a date string is in the MM/DD/YYYY format in SQL Server?
SET DATEFORMAT MDY;
SELECT CASE WHEN ISDATE(#string) = 1
AND #string LIKE '[0-1][0-9]/[0-3][0-9]/[1-2][0-9][0-9][0-9]'
THEN 1 ELSE 0 END;
If the result is 1, it's a valid date, but there's no guarantee that it's the date the user meant. If they enter:
06/07/2012
There is no way to know if they meant June 7 or July 6. Your best bet is to make users pick dates from drop-downs or calendar controls, which allows you to control the format and avoid any needless interpretation. Your application layer can use strongly typed variables / parameters and insert into properly typed columns.
If you're after the SQL Server dateformat to see whether it's MDY then use:
dbcc useroptions
And have a look at the dateformat Set Option
you convert date to datestring in this format MM/DD/YYYY using CONVERT function
select convert(varchar(10),getdate(),101)
The output will be as of Sept 8th 2012
09/08/2012
There is no need to validate, other then checking the date field is null or not
You have to do it outside the database. A database stores datetime internally in its own format. I dont think you can read what format the date is stored in. You can read it which ever way you like, for example dd/mm/yyyy or yyyy/mm/dd etc.
What you can do is check this value outside the database for any date field. You can use regular expression for that. But that will be outside the database.
I have Following dummy table with data:
ACID srno date(mm/dd/yyyy) name
3 1 04/12/2010 mahesh
3 2 04/12/2010 mahendra
Now if I try with Following SQL Transact:
select srno from dummy
where name = 'mahesh'
and date= convert(datetime,'12/04/2010',101) –- I have date in dd/MM/yyyy Format
and ACID=3
It’s Not returning the srno of the table. That means Date is not execute convert statement as above
What’s the reason?
Try using style 103 instead of 101.
select srno from dummy
where name = 'mahesh'
and date= convert(datetime,'12/04/2010',103) –- I have date in dd/MM/yyyy Format
and ACID=3
If you convert 12/04/2010 using format 101, you get date "December 4, 2010", which is not in your database. Use format 103 to convert a date in format dd/mm/yyyy to DateTime.
The database stores dates using the DateTime type which is format-agnostic. It does have a default format for string conversions, which seems to be mm/dd/yyyy (101) on your database.
However, when you convert a string to add it to your table, you want to specify the format of your input string, in your example dd/mm/yyyy (103).
Take a look at the MSDN article for CAST and CONVERT which details all format styles that you can use with dates.
To be honest, if you want to specify a DATE LITERAL in SQL Server, please stick with the simplest YYYYMMDD format, e.g.
and dummy.date = '20100412'
It is robust and works for all regional, user language and dateformat settings. This assumes the other side of the comparison is already a date column. Even if you had to CAST it, using this format you don't need to specify a format
and dummy.date = cast('20100412' as datetime)