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EOMONTH (Transact-SQL)

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Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW)

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

Transact-SQL syntax conventions

Syntax

EOMONTH ( start_date [, month_to_add ] )

Note

To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation.

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

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)