What is datetime data type in SQL Server?

What is datetime data type in SQL Server?

What is the datetime data type? In SQL, datetime date data type is used for values that contain both date and time. Microsoft defines it as a date combined with a time of day with fractional seconds that is based on a 24-hour clock. SQL retrieves and displays DATETIME values in ‘YYYY-MM-DD hh: mm: ss’ format.

How do you declare a datetime variable in SQL?

To declare a date variable, use the DECLARE keyword, then type the @variable_name and variable type: date, datetime, datetime2, time, smalldatetime, datetimeoffset. In the declarative part, you can set a default value for a variable. The most commonly used default value for a date variable is the function Getdate().

What data type is datetime?

The DATETIME type is used for values that contain both date and time parts. MySQL retrieves and displays DATETIME values in ‘ YYYY-MM-DD hh:mm:ss ‘ format. The supported range is ‘1000-01-01 00:00:00’ to ‘9999-12-31 23:59:59’ . The TIMESTAMP data type is used for values that contain both date and time parts.

How is datetime stored in SQL Server?

According to SQL Server documentation, the database engine stores a DATETIME value as two integers. The first integer represents the day and the second integer represents the time. 003 seconds after midnight. That means the time 00:00:00.003 is stored as 1, and the time 00:00:01.000 is stored as 300.

How do I insert datetime in MS SQL?

insert into table1(approvaldate)values(‘20120618 10:34:09 AM’); If you are married to the dd-mm-yy hh:mm:ss xm format, you will need to use CONVERT with the specific style. insert into table1 (approvaldate) values (convert(datetime,’18-06-12 10:34:09 PM’,5)); 5 here is the style for Italian dates.

How do you declare datetime?

SQL SERVER – Adding Datetime and Time Values Using Variables

1. It is shown below. DECLARE @date DATETIME. SET @date=’2010-10-01′
2. DECLARE @date DATETIME, @time time. SET @date=’2010-10-01′ SET @time=’15:00:00′
3. So the solution is to convert time datatype into datetime and add. DECLARE @date DATETIME, @time time.

How do you write datetime?

You can generate a DATETIME constant by specifying a date and time as a string and then casting the string as a DATETIME data type. The string must have the following format: YYYY-MM-DD HH:MM:SS.

What does a datetime look like?

Internally, all DateTime values are represented as the number of ticks (the number of 100-nanosecond intervals) that have elapsed since 12:00:00 midnight, January 1, 0001. The appearance of a DateTime value is the result of a formatting operation that converts a value to its string representation.

What format does SQL store datetime?

Date and Time data types

Data type	Format	Storage size (bytes)
date	YYYY-MM-DD	3
smalldatetime	YYYY-MM-DD hh:mm:ss	4
datetime	YYYY-MM-DD hh:mm:ss[.nnn]	8
datetime2	YYYY-MM-DD hh:mm:ss[.nnnnnnn]	6 to 8