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title: "DAY (Transact-SQL) | Microsoft Docs" ms.custom: "" ms.date: "07/30/2017" ms.prod: "sql" ms.prod_service: "database-engine, sql-database, sql-data-warehouse, pdw" ms.service: "" ms.component: "t-sql|functions" ms.reviewer: "" ms.suite: "sql" ms.technology:

  • "database-engine" ms.tgt_pltfrm: "" ms.topic: "language-reference" f1_keywords:
  • "DAY_TSQL"
  • "DAY" dev_langs:
  • "TSQL" helpviewer_keywords:
  • "date and time [SQL Server], DAY"
  • "dates [SQL Server], functions"
  • "DAY function [SQL Server]"
  • "dates [SQL Server], days"
  • "functions [SQL Server], date and time"
  • "dateparts [SQL Server], day" ms.assetid: 2f4410ea-fd3e-4d69-ac4b-3b0091a084bc caps.latest.revision: 41 author: "edmacauley" ms.author: "edmaca" manager: "craigg" ms.workload: "Active" monikerRange: ">= aps-pdw-2016 || = azuresqldb-current || = azure-sqldw-latest || >= sql-server-2016 || = sqlallproducts-allversions"

DAY (Transact-SQL)

[!INCLUDEtsql-appliesto-ss2008-all-md]

Returns an integer representing the day (day of the month) of the specified date.

For an overview of all [!INCLUDEtsql] date and time data types and functions, see Date and Time Data Types and Functions (Transact-SQL).

Topic link icon Transact-SQL Syntax Conventions

Syntax

DAY ( date )

Arguments

date
Is an expression that can be resolved to a time, date, smalldatetime, datetime, datetime2, or datetimeoffset value. The date argument can be an expression, column expression, user-defined variable or string literal.

Return Type

int

Return Value

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

If date contains only a time part, the return value is 1, the base day.

Examples

The following statement returns 30. This is the number of the day.

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

The following statement returns 1900, 1, 1. The argument for date is the number 0. [!INCLUDEssNoVersion] interprets 0 as January 1, 1900.

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

See also

CAST and CONVERT (Transact-SQL)