| CURRENT_TIMESTAMP | Returns the current date and time |
| DATEADD | Adds a time/date interval to a date and then returns the date |
| DATEDIFF | Returns the difference between two dates |
| DATEFROMPARTS | Returns a date from the specified parts (year, month, and day values) |
| DATENAME | Returns a specified part of a date (as string) |
| DATEPART | Returns a specified part of a date (as integer) |
| DAY | Returns the day of the month for a specified date |
| GETDATE | Returns the current database system date and time |
| GETUTCDATE | Returns the current database system UTC date and time |
| ISDATE | Checks an expression and returns 1 if it is a valid date, otherwise 0 |
| MONTH | Returns the month part for a specified date (a number from 1 to 12) |
| SYSDATETIME | Returns the date and time of the SQL Server |
| YEAR | Returns the year part for a specified date |
ref: https://www.w3schools.com/sql/sql_ref_sqlserver.asp
