First day of next month: Get the first day of the current month and add 1 month?

Question

Joe Short · Accepted Answer

These kinds of functions are used in procedure/ reports, SSIS ETLS to extract the data based on the dates. Below are the functions with logic explanation:

1. First day of current month:

        select DATEADD(mm, DATEDIFF(m,0,GETDATE()),0):

in this we have taken out the difference between the months from 0 to current date and then add the difference in 0 this will return the first day of current month.

2. Last day of current month:

        SELECT cast(DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE())+1,0)) as date):starting from innermost query(DATEDIFF(m,0,GETDATE()))

will help you to take out the difference between the months from 0 to current date after that we will add a month to it which will make it next month after that we will subtract 1 sec from it and which will give us the last second of this month post that we will cast that into date, to get last day of this month.

3. First day of next month:

        SELECT DATEADD(mm, DATEDIFF(m,0,GETDATE())+1,0) ):

in this we have taken out the difference between the months from 0 to current date and then add 1 to the difference and 0 this will return the first day of next month.

In the similar logic we can extract:

4. Last day of next month:

        SELECT cast(DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE())+2,0)) as date)

5. First day of previous month:

        select DATEADD(mm, DATEDIFF(m,0,GETDATE())-1,0)

6. Last day of previous month:

        SELECT cast(DATEADD(s,-1,DATEADD(mm, DATEDIFF(m,0,GETDATE()),0)) as date)

7. First day of current year:

        Select DATEADD(yy, DATEDIFF(yy,0,GETDATE()),0): in this case we will extract the difference between the years and add

8. Last day of current year:

        SELECT cast(DATEADD(s,-1,DATEADD(yy, DATEDIFF(yy,0,GETDATE()),0)) as date)

Ranjana Admin · Answer

If you’re looking to calculate the first day of the next month by getting the first day of the current month and adding one month, here’s how you can do it in a few steps:

Step 1: Get the First Day of the Current Month

Most programming languages have functions to extract the current date and adjust it to the first day of the current month. For example:

In SQL:

  SELECT DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0) AS FirstDayCurrentMonth;

This calculates the first day of the current month by removing the day offset.

Step 2: Add One Month

Once you have the first day of the current month, you can add one month to it. Here’s how:

In SQL:

  SELECT DATEADD(MONTH, 1, DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0)) AS FirstDayNextMonth;

In Python with datetime:

  from datetime import datetime, timedeltafrom dateutil.relativedelta import relativedeltatoday = datetime.today()first_day_current_month = today.replace(day=1)first_day_next_month = first_day_current_month + relativedelta(months=1)print(first_day_next_month)

Why It Works

Adjusting the day to 1 ensures you’re working with the first day of the current month.
Adding one month shifts it to the next month, regardless of how many days are in the current month.

This approach is clean and works well across most languages or tools! Let me know if you’d like more specific examples.

Mack Ryan · Answer

SELECT DATEADD(mm, DATEDIFF(m, 0, GETDATE()), 0);

Logic: DATEDIFF(m, 0, GETDATE()) calculates the number of months between the base date (0 which translates to '1900-01-01') and the current date (GETDATE()). DATEADD(mm, , 0) then adds this number of months to the base date, effectively giving the first day of the current month. Get ready to defy gravity and embark on an unforgettable adventure in Slope Game.

Ranjana Admin · Answer

To obtain the first day of the next month, you start by getting the first day of the current month and then adding one month to it. Here's how you can do it:

Get the current date.

Set the day of the date to 1 to get the first day of the current month.

Add one month to the date.

Now you have the first day of the next month.

Here's a Python example using the datetime module:

python

Copy code

import datetime
# Get the current date
current_date = datetime.date.today()
# Set the day of the date to 1 to get the first day of the current month
first_day_of_current_month = datetime.date(current_date.year, current_date.month, 1)
# Add one month to the date
first_day_of_next_month = first_day_of_current_month.replace(month=first_day_of_current_month.month + 1)
print("First day of next month:", first_day_of_next_month)

This will output the first day of the next month based on the current date.

First day of next month: Get the first day of the current month and add 1 month?

Your answer

4 Answers

More SQL Server discussions

Want answers to more SQL Server questions?

Stay in the loop — it’s free

You’re on the list!