DAY (Transact-SQL)

**APPLIES TO:** SQL Server (starting with 2008) Azure SQL Database Azure SQL Data Warehouse Parallel Data Warehouse

This function returns an integer that represents the day (day of the month) of the specified date.

See Date and Time Data Types and Functions (Transact-SQL) for an overview of all Transact\-SQL date and time data types and functions.

Transact-SQL Syntax Conventions

Syntax

DAY ( date )  

Arguments

date
An expression that resolves to one of the following data types:

• date
• datetime
• datetimeoffset
• datetime2
• smalldatetime
• time

For date, DAY will accept a column expression, expression, string literal, or user-defined variable.

Return Type

int

Return Value

DAY returns the same value as DATEPART (day, date).

If date contains only a time part, DAY will return 1 - the base day.

Examples

This statement returns 30 - the number of the day itself.

SELECT DAY('2015-04-30 01:01:01.1234567');  

This statement returns 1900, 1, 1. The date argument has a number value of 0. SQL Server interprets 0 as January 1, 1900.

SELECT YEAR(0), MONTH(0), DAY(0);  

See also

CAST and CONVERT (Transact-SQL)