SQL Server: DAY Function

In this post explains how to use the DAY function in SQL Server (Transact-SQL) with syntax and examples.

Description

In SQL Server (Transact-SQL), the DAY function returns the day of the month (a number from 1 to 31) given a date value.

Syntax

The syntax for the DAY function in SQL Server (Transact-SQL) is:

DAY( date_value )

Parameters or Arguments

date_value

The date from which to extract the day of the month.

Note

• See also the DATEPART and DATENAME functions.

Applies To

The DAY function can be used in the following versions of SQL Server (Transact-SQL):

• SQL Server 2017, SQL Server 2016, SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005

Example

Let's look at some SQL Server DAY function examples and explore how to use the DAY function in SQL Server (Transact-SQL).

For example:

SELECT DAY('2014/04/28');
Output: 28

SELECT DAY('2014/03/31 10:05');
Output: 31

SELECT DAY('2014/04/01 10:05:18.621');
Output: 1