If you use the django-mssql-backend
package [GitHub], then it is a DateTimeField
[Django-doc], based on the source code [GitHub]:
data_types = { # ..., 'DateTimeField': 'datetime2', # … }
This will thus translate to a datetime2
column type, and the default precision is seven [ms-doc]:
Precision, scale, 0 to 7 digits, with an accuracy of 100ns. The default precision is 7 digits.