How to Determine the Number of Days in a Month Using SQL Server?

Determining the Number of Days in a Month in SQL Server

Problem:

Determining the number of days in a month is a common requirement in data analysis and reporting. How can we accomplish this task in SQL Server?

Solution:

SQL Server 2012 provides a built-in function called EOMONTH (Transact-SQL). This function returns the last day of a specified month. By combining EOMONTH with another built-in function, DAY (Transact-SQL), we can calculate the number of days in the month.

Implementation:

DECLARE @ADate DATETIME

SET @ADate = GETDATE()

SELECT DAY(EOMONTH(@ADate)) AS DaysInMonth

In this example, @ADate is set to the current date. The EOMONTH function is applied to @ADate, returning the last day of the current month. Finally, the DAY function is used to extract the day of the month, which corresponds to the number of days in the month.

This method provides a straightforward and efficient solution for determining the number of days in a month in SQL Server.

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