SQL Server CONVERT() Function
Definition and Usage
The CONVERT() function converts a value (of any type) into a specified datatype.
Tip: Also look at the CAST() function.
Syntax
CONVERT(data_type(length), expression, style)
Parameter Values
Value | Description | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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data_type | 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) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
expression | Required. The value to convert to another data type | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
style | Optional. The format used to convert between data types, such as a date
or string format. Can be one of the following values:
Converting datetime to character:
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Technical Details
Works in: | SQL Server (starting with 2008), Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse |
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More Examples
Example
Convert an expression from one data type to another (varchar):
SELECT CONVERT(varchar, 25.65);
Try it Yourself »Example
Convert an expression from one data type to another (datetime):
SELECT CONVERT(datetime, '2017-08-25');
Try it Yourself »Example
Convert an expression from one data type to another (varchar):
SELECT CONVERT(varchar,
'2017-08-25', 101);
Try it Yourself »