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Don Burleson Blog 







Oracle Date Functions

Oracle Database Tips by Donald Burleson

SYSDATE() is, perhaps, the most commonly used Oracle date function provided by SQL*Plus.

The Oracle date function SYSDATE() returns the current date and time in the default Oracle date format. The default format for the date returned is


It's very common to use the Oracle date function SYSDATE() in conjunction with to_char(). For example,


This Oracle date function returns a string containing not only the current date, but also the current time down to the second. The most common uses of SYSDATE() don't use a date format model:

dStartDate := SYSDATE;

Other Oracle Date Functions

Oracle date function - months_between (l,e)

This Oracle date function returns the months between two dates.  If I wanted to know how many months an employee has worked for the company, I can use this Oracle date function.  There is an emp_hire_date in the emp table.

Notice that this Oracle date function returns the fraction of a month.  You could use trunc or round to make the results more readable. 


Oracle date function - add_months (d,n)

The add_months Oracle date function gives you the same day, n number of months away.  The n can be positive or negative.


Oracle date function - last_day (d)

The last_day Oracle date function returns the last day of the month of the date d.  If you want to find the first day of the next month, simply add one to the last_day results.


Oracle date function - next_day (d, day_of_week)

The next_day Oracle date function returns the date of the day_of_week after date d.  day_of_week can be the full name or abbreviation.  Below, we get the date for next Monday, next Friday, and the first Tuesday of next month. 

Related Date Functions Articles:

Date Functions
Alphabetic Functions




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