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SQL Server CONVERT() Function

Example

Convert an expression to int:

SELECT CONVERT(int, 25.65);
Try it Yourself »

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
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:
Without century With century Input/Output Standard
0 100 mon dd yyyy hh:miAM/PM Default
1 101 mm/dd/yyyy US
2 102  yyyy.mm.dd ANSI
3 103  dd/mm/yyyy British/French
4 104 dd.mm.yyyy German
5 105  dd-mm-yyyy Italian
6 106 dd mon yyyy -
7 107 Mon dd, yyyy -
8 108 hh:mm:ss -
9 109 mon dd yyyy hh:mi:ss:mmmAM (or PM) Default + millisec
10 110 mm-dd-yyyy USA
11 111  yyyy/mm/dd Japan
12 112  yyyymmdd ISO
13 113 dd mon yyyy hh:mi:ss:mmm Europe (24 hour clock)>
14 114 hh:mi:ss:mmm 24 hour clock
20 120 yyyy-mm-dd hh:mi:ss ODBC canonical (24 hour clock)
21 121 yyyy-mm-dd hh:mi:ss.mmm ODBC canonical (24 hour clock)
  126 yyyy-mm-ddThh:mi:ss.mmm ISO8601
  127 yyyy-mm-ddThh:mi:ss.mmmZ ISO8601 (with time zone Z)
  130 dd mon yyyy hh:mi:ss:mmmAM Hijiri
  131 dd/mm/yy hh:mi:ss:mmmAM Hijiri
Converting float to real:
Value Explanation
0 Maximum 6 digits (default)
1 8 digits
2 16 digits
Converting money to character:
Value Explanation
0 No comma delimiters, 2 digits to the right of decimal
1 Comma delimiters, 2 digits to the right of decimal
2  No comma delimiters, 4 digits to the right of decimal

Technical Details

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

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 »