What is the data type for date in SQL?

What is the data type for date in SQL?

Date and Time data types

Data type Format Accuracy
date YYYY-MM-DD 1 day
smalldatetime YYYY-MM-DD hh:mm:ss 1 minute
datetime YYYY-MM-DD hh:mm:ss[.nnn] 0.00333 second
datetime2 YYYY-MM-DD hh:mm:ss[.nnnnnnn] 100 nanoseconds

Is date a data type?

The DATE data type stores the calendar date. A calendar date is stored internally as an integer value equal to the number of days since December 31, 1899. Because DATE values are stored as integers, you can use them in arithmetic expressions. For example, you can subtract a DATE value from another DATE value.

What is default date format in SQL?

Backward compatibility for down-level clients

SQL Server data type Default string literal format passed to down-level client
time hh:mm:ss[.nnnnnnn]
date YYYY-MM-DD
datetime2 YYYY-MM-DD hh:mm:ss[.nnnnnnn]
datetimeoffset YYYY-MM-DD hh:mm:ss[.nnnnnnn] [+|-]hh:mm

How do I get 1900 date in SQL?

TimeInt

  1. DECLARE @a DATETIME = ‘1900-01-01 00:00:00.000’
  2. CAST(SUBSTRING(CONVERT(VARBINARY(8), @a), 1, 4) AS INT) AS DateInt,
  3. CAST(SUBSTRING(CONVERT(VARBINARY(8), @a), 5, 4) AS INT) AS TimeInt;

How is date stored in SQL?

Internally dates are stored as 2 integers. The first integer is the number of dates before or after the base date (1900/01/01). The second integer stores the number of clock ticks after midnight, each tick is 1⁄300 of a second.

What is the default for date data type?

Use the Date data type to contain date values, time values, or date and time values. The default value of Date is 0:00:00 (midnight) on January 1, 0001. You can get the current date and time from the DateAndTime class.

How do I check if a date is correct in SQL?

In SQL Server, you can use the ISDATE() function to check if a value is a valid date. To be more specific, this function only checks whether the value is a valid date, time, or datetime value, but not a datetime2 value. If you provide a datetime2 value, ISDATE() will tell you it’s not a date (it will return 0 ).