Contents
Which data type is used to store date and time values?
DateTime
Introduction
| Data type | Comments |
|---|---|
| DateTime | Is used to store date and time between 01/01/1753 to 31/12/9999. Minimum unit of time it keeps is milliseconds with an accuracy of 3.33 ms. Takes 8 bytes for storage. |
How datetime is 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.
What datatype is used for time in SQL?
Date and Time data types
| Data type | Format | Accuracy |
|---|---|---|
| time | hh:mm:ss[.nnnnnnn] | 100 nanoseconds |
| 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 |
What type of data type is a date?
ordinal
They are ordinal, as one date is bigger than the date before it. It is also quantitative as it can added, subtracted…etc.
What is the difference between DateTime and Datetime2?
The main difference is the way of data storage: while in Datetime type, the date comes first and then time, in Datetime2, 3 bytes, in the end, represents date part! Depending on precision, Datetime2 takes between 6 and 8 bytes of storage.
When to use time, date, datetime2 and datetimeoffset?
Use the time, date, datetime2 and datetimeoffset data types for new work. These types align with the SQL Standard. They are more portable. time, datetime2 and datetimeoffset provide more seconds precision. datetimeoffset provides time zone support for globally deployed applications. YYYY is four digits from 1753 through 9999 that represent a year.
What happens when you convert date and time data?
When you convert to date and time data types, SQL Server rejects all values it can’t recognize as dates or times. For information about using the CAST and CONVERT functions with date and time data, see CAST and CONVERT (Transact-SQL). This section describes what occurs when other date and time data types are converted to the datetime data type.
Which is the default date without a time component?
If you specify a date value without a time component, then the default time is midnight. If you specify a date value without a date, then the default date is the first day of the current month.
What kind of information is stored in the date datatype?
The DATE datatype stores date and time information. Although date and time information can be represented in both character and number datatypes, the DATE datatype has special associated properties. For each DATE value, Oracle stores the following information: century, year, month, date, hour, minute, and second.