Best approach to remove time part of datetime in SQL Server

The advantage of using the ISO-8601 format is that it is an international standard with unambiguous specification. For example, April or the month abbreviation of Apr specified in the current language; commas are optional and capitalization is ignored. As soon as you go things convert before returning to the caller, you are removing all hope that the referential integrity of the application. That is, if the data you store only the date and no time, consider storing it as a DATETIME with midnight as the time. Because. There is a big difference; try to Export to MS Excel and you will see that the datetime is much better than the date. There is also no real need in the DateDiff method for DateAdd afterward as integer result will also be implicitly converted back to datetime. This ODBC timestamp format is also supported supported by the OLE DB language definition (DBGUID-SQL), the Microsoft OLE DB provider for SQL Server. DD is two digits that range from 01 to 31, depending on month, day of the specified month. For languages other than English, you use N-2) characters in square brackets are optional. 3) If you specify only the last two digits of the year, values are lower than the last two digits of the value of the configure the two digit year cutoff Server configuration Option configuration option in the same century as the cutoff year. For information about using the CAST and CONVERT functions with date and time data, see CAST and CONVERT (Transact-SQL). Because it has attracted low-quality or spam answers, which had to be removed, the posting needed a reply now 10 reputation on this site (the Association bonus does not count ). The following example shows the results of converting a datetimeoffset(4) value to a datetime value. As Mike says, only in 2008, but if you find a 2005 and earlier DB somewhere, you may have a lot of questions:). To check if you want to, for accuracy, the only things possible dates for a day in a table and check the results. If you use the CONVERT() like the one that you really want to do a string for later use, so that you'll put, it like that - although it would be better if you use the date formatting functions instead of cutting the date - or via CAST(.

Strange though that my experiments pointed out that the float method is actually slower by 3.5% on SQL Server 2008 as the dateadd(dd,0, datediff(dd,0, getDate ())) method. Values that are greater than or equal to the value of this option are in the century that comes before the cutoff year. I agree with this answer is that the formatting should be on the presentation layer, but I did not agree with the implication that you are leaving that for the front-end does not mean that you have to know the cut off is a quick way. My point is still that you should never for such a reduction on the column, though, is that most people the first instinct. To avoid ambiguity, use four-digit year. 4) If the day is missing, the first day of the month. That said, I'm starting to reconsider; especially for sql server 2008, where it is completely unnecessary anyway. When the fractional precision of the DateTimeOffset(n) value is greater than three digits, the value is truncated. The time is 00:00:00.000. The following code shows the results of converting a date value to a datetime value.

But in most cases, this is a terrible solution-running a UDF once for each row, is a possibility, only the performance of a query to kill, without the need for you. When the fractional precision of the time(n) value is greater than three digits, the value is truncated. To hide many rows to the client, the performance difference becauses it takes longer to send the rows over the network than it does to perform the calculations. These are filtered in the rule, small datasets once, you run the UDF via this small number of records will not be a drop in performance. Here are some guidelines for using alphabetic date formats: 1), you Close the date and time data in single quotation marks ('). In this way, the user will be applied-defined function only, the filtered result-set and not every row in the table as part of the filter. In short, it is a one time effort, the for the FLOAT-based query has the equivalent effort for each line. But most of the methods are a bit unclear and it would be difficult for you to remember the numbers for format, type, or functions to Specific date Format. So the data type of this ODBC function is varchar(10), which means that, if you want to compare the result to a datetime, you get an implicit conversion from varchar(10) datetime on a string yyyy-mm-dd. You are looking other questions tagged sql sql-server tsql sql-server-2008-datetime-conversion or ask your own question.