1. Trainer: Bach Ngoc Toan– TEDU Website: http://tedu.com.vn
Lesson 38
SQL Working With Dates
Trainer: Bach Ngoc Toan– TEDU
Website:

2. SQL Dates
The most difficult part when working with dates is to be sure that the format of the date you are trying to insert, matches the format of the date column in the database.

3. SQL Date Data Types
SQL Server comes with the following data types for storing a date or a date/time value in the database:
DATE - format YYYY-MM-DD
DATETIME - format: YYYY-MM-DD HH:MI:SS
SMALLDATETIME - format: YYYY-MM-DD HH:MI:SS
TIMESTAMP - format: a unique number

4. SQL Working with Dates
You can compare two dates easily if there is no time component involved!

5. SQL Server Date Functions
CURRENT_TIMESTAMP
Returns the current date and time
DATEADD
Returns a date after a certain time/date interval has been added
DATEDIFF
Returns the difference between two date values, based on the interval specified
DATENAME
Returns a specified part of a given date, as a string value
DATEPART
Returns a specified part of a given date, as an integer value
DAY
Returns the day of the month (from 1 to 31) for a given date
GETDATE
GETUTCDATE
Returns the current UTC date and time
MONTH
Returns the month (from 1 to 12) for a given date
YEAR
Returns the year (as a four-digit number) for a given date