Value range of various datetimes in SQL Server 2008

stay SQL SERVER in DATETIME The time expressed is 00:00:00 To 23:59:59.997, Its time accuracy is 1/300 second , When used, it will be rounded to .000、.003 or .007 Three increments per second . The following table is DATETIME The precision of the decimal part of the second is rounded .

User specified value	Use DateTime Type, the value stored by the system
1998-1-1   23:59:59.990 1998-1-1   23:59:59.991	1998-01-01 23:59:59.990
1998-1-1   23:59:59.992 1998-1-1   23:59:59.993 1998-1-1   23:59:59.994	1998-01-01 23:59:59.993
1998-1-1   23:59:59.995 1998-1-1   23:59:59.996 1998-1-1   23:59:59.997 1998-1-1   23:59:59.998	1998-01-01 23:59:59.997
1998-1-1   23:59:59.999	1998-01-02 00:00:00.000

 

stay SQL SERVER 2008 Added in Datetime2 type , It can provide higher time accuracy , And you can customize the time accuracy , This data type can be used later .Datetime2 The accuracy of 100 nanosecond .

 

SQL Server 2008 except DateTime and SmallDateTime outside , Four new time types have been added , Respectively ：date,time,datetime2 and datetimeoffset.

Each time type range 、 Accuracy schedule ：

data type	Time range	precision
Smalldatetime	1900-01-01 To 2079-06-06 00:00:00 To   23:59:59	minute
Datetime	1753-01-01 To 9999-12-31 00:00:00 To   23:59:59.997	3.33 millisecond
Time	00:00:00.0000000 To   23:59:59.9999999	100 nanosecond
Date	0001-01-01 To 9999-12-31	God
Datetime2	0001-01-01 To 9999-12-31 00:00:00 To   23:59:59.9999999	100 nanosecond
Datetimeoffset	0001-01-01 To 9999-12-31 00:00:00 To   23:59:59.9999999 -14:00 To +14:00	100 nanosecond

 

A list of time type expressions ： data type Output time 12:35:29. 1234567 date 2007-05-08 smalldatetime 2007-05-08 12:35:00 datetime 2007-05-08 12:35:29.123 datetime2 2007-05-08 12:35:29. 1234567 datetimeoffset 2007-05-08 12:35:29.1234567 +12:15