Coding With Fun
Home Docker Django Node.js Articles Python pip guide FAQ Policy

What's the difference between datetime 2 and datetime 3?


Asked by Kalel Turner on Dec 02, 2021 FAQ



DateTime 3 changes DateTime to be a new-style class with slots instead of being an old-style class. DateTime 3 tries to preserve microsecond resolution throughout most of its API’s while former versions were often only accurate to millisecond resolution.
Indeed,
Another difference between DATETIME and DATETIME2 data types is the default casting to string: SQL Server: Format yyyy-mm-dd hh:mi:ss.mmm is more widely used, it is guided by ISO/ODBC and many applications may expect it rather than mon dd yyyy hh:miAM.
In addition, These uses for DateTimeOffset values are much more common than those for DateTime values. As a result, consider DateTimeOffset as the default date and time type for application development. A DateTimeOffset value isn't tied to a particular time zone, but can originate from a variety of time zones.
In fact,
However, if we attempt to assign the same string literal to the datetime variable that we assigned to datetime2, we get an error: Msg 241, Level 16, State 1, Line 5 Conversion failed when converting date and/or time from character string. This is because datetime only accepts string literals that have 3 or less fractional seconds.
Next,
datetime.datetime is a combination of a date and a time. It has all the attributes of both classes. The three classes that represent dates and times in datetime have similar initializers. They can be instantiated by passing keyword arguments for each of the attributes, such as year, date, or hour.