DAY (Transact-SQL)

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

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.

Syntax

syntaxsql

DAY ( date )

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

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

int

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

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

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

SQL

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.

SQL

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