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SQL Server CAST() Function

❮ SQL Server Functions

Example

Convert a value to an int datatype:

SELECT CAST(25.65 AS int);
Try it Yourself »

Definition and Usage

The CAST() function converts a value (of any type) into a specified datatype.

Tip: Also look at the CONVERT() function.

Syntax

CAST(expression AS datatype(length))

Parameter Values

Value Description
expression Required. The value to convert
datatype Required. The datatype to convert expression to. Can be one of the following: bigint, int, smallint, tinyint, bit, decimal, numeric, money, smallmoney, float, real, datetime, smalldatetime, char, varchar, text, nchar, nvarchar, ntext, binary, varbinary, or image
(length) Optional. The length of the resulting data type (for char, varchar, nchar, nvarchar, binary and varbinary)

Technical Details

Works in: SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse

More Examples

Example

Convert a value to a varchar datatype:

SELECT CAST(25.65 AS varchar);
Try it Yourself »

Example

Convert a value to a datetime datatype:

SELECT CAST('2017-08-25' AS datetime);
Try it Yourself »

❮ SQL Server Functions