EOMONTH (Transact-SQL)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2012)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

This function returns the last day of the month containing a specified date, with an optional offset.

Topic link icon Transact-SQL Syntax Conventions

Syntax

EOMONTH ( start_date [, month_to_add ] )  

Arguments

start_date
A date expression that specifies the date for which to return the last day of the month.

month_to_add
An optional integer expression that specifies the number of months to add to start_date.

If the month_to_add argument has a value, then EOMONTH adds the specified number of months to start_date, and then returns the last day of the month for the resulting date. If this addition overflows the valid range of dates, then EOMONTH will raise an error.

Return Type

date

Remarks

The EOMONTH function can remote to SQL Server 2012 (11.x) servers and higher. It cannot be remote to servers with a version lower than SQL Server 2012 (11.x).

Examples

A. EOMONTH with explicit datetime type

DECLARE @date DATETIME = '12/1/2011';  
SELECT EOMONTH ( @date ) AS Result;  
GO  

Here is the result set.

Result  
------------  
2011-12-31  

(1 row(s) affected)  

B. EOMONTH with string parameter and implicit conversion

DECLARE @date VARCHAR(255) = '12/1/2011';  
SELECT EOMONTH ( @date ) AS Result;  
GO  

Here is the result set.

Result  
------------  
2011-12-31  

(1 row(s) affected)  

C. EOMONTH with and without the month_to_add parameter

Note: the values shown in these result sets reflect an execution date between and including

    12/01/2011

    and

    12/31/2011
DECLARE @date DATETIME = GETDATE();  
SELECT EOMONTH ( @date ) AS 'This Month';  
SELECT EOMONTH ( @date, 1 ) AS 'Next Month';  
SELECT EOMONTH ( @date, -1 ) AS 'Last Month';  
GO  

Here is the result set.

This Month  
-----------------------  
2011-12-31  

(1 row(s) affected)  

Next Month  
-----------------------  
2012-01-31  

(1 row(s) affected)  

Last Month  
-----------------------  
2011-11-30  

(1 row(s) affected)