Is DATETIME2 better than datetime?

SQL Server Datetime vs Datetime2 Precision The Datetime2 data type in SQL Server has a precision of 1⁄10000000 of a second, which means we can store 0.0000001 seconds as the smallest unit of time. Whereas, Datetime has a 1/300 second precision, and . 003 second is the smallest unit of time that can be stored.

What is difference between datetime and DATETIME2 in SQL Server?

DATETIME2 has a date range of “0001 / 01 / 01” through “9999 / 12 / 31” while the DATETIME type only supports year 1753-9999. Also, if you need to, DATETIME2 can be more precise in terms of time; DATETIME is limited to 3 1/3 milliseconds, while DATETIME2 can be accurate down to 100ns. Both types map to System.

How do I truncate a date and time in SQL?

A) Truncate a date value using default format

  1. SELECT TO_CHAR( TRUNC(TO_DATE( ’04-Aug-2017 15:35:32 ‘, ‘DD-Mon-YYYY HH24:MI:SS’ )), ‘DD-Mon-YYYY HH24:MI:SS’ ) result FROM dual;
  2. RESULT ——————– 04-Aug-2017 00:00:00.
  3. SELECT TRUNC( SYSDATE, ‘MM’ ) result FROM dual;
  4. SELECT TRUNC( SYSDATE, ‘Q’ ) result FROM dual;

How do I truncate a timestamp in SQL Server?

Here are the most common.

  1. The correct way (new since Sql Server 2008): cast(getdate() As Date)
  2. The correct way (old): dateadd(dd, datediff(dd,0, getDate()), 0)
  3. The fast way: cast(floor(cast(getdate() as float)) as datetime)
  4. The wrong way: cast(convert(char(11), getdate(), 113) as datetime)

What is the equivalent of TRUNC in SQL Server?

TRUNC Conversion Overview

Oracle SQL Server
TRUNC(exp [,’DD’]) CONVERT(DATETIME, CONVERT(DATE, exp)) Since SQL Server 2008
TRUNC(exp, ‘MM’) CONVERT(DATETIME, CONVERT(VARCHAR(7), exp, 120) + ‘-01’)
TRUNC(exp, ‘YY’) CONVERT(DATETIME, CONVERT(VARCHAR(4), exp, 120) + ‘-01-01’)

Should I use DATETIME2 or Datetimeoffset?

If you are storing only UTC values (where the offset is always zero), you can save storage space with datetime2 . datetimeoffset requires 10 bytes of storage whereas datetime needs 8 bytes for precision 5 or greater, 7 bytes for precision 3-4, and 6 bytes for precision 2 or less.

How do I truncate a date in SQL?

The TRUNC (date) function returns date with the time portion of the day truncated to the unit specified by the format model fmt . The value returned is always of datatype DATE , even if you specify a different datetime datatype for date . If you omit fmt , then date is truncated to the nearest day.

What is the difference between datetime and SmallDateTime in SQL Server?

The DateTime & SmallDateTime in SQL Server are the data types that store both date & time together. The time is based on the 24 hours clock. The Microsoft advices users not to use DateTime & SmallDateTime Data Types….DateTime Vs SmallDateTime.

DateTime SmallDateTime
Syntax datetime smalldatetime

Should I use DateTime2 or Datetimeoffset?

Does DateTime2 have timezone?

When a datetime2 value is cast to a varbinary value, an additional byte is added to the varbinary value to store precision. For data type metadata, see sys….datetime2 description.

Property Value
Time range 00:00:00 through 23:59:59.9999999
Time zone offset range None

Should I use DateTimeOffset or datetime?

With its Kind property, DateTime is able to reflect only Coordinated Universal Time (UTC) and the system’s local time zone. DateTimeOffset reflects a time’s offset from UTC, but it does not reflect the actual time zone to which that offset belongs.

What is the difference between date and TIMESTAMP in SQL?

DATE stores values as century, year, month, date, hour, minute, and second. TIMESTAMP stores values as year, month, day, hour, minute, second, and fractional seconds.