What is a convert function in database?
In SQL Server, the Convert function converts an expression from one datatype to another datatype.
Syntax:
- The syntax for the CONVERT function in SQL Server (Transact-SQL) is:
- CONVERT (type [ (length) ], expression [ , style ] )
Type:
- The datatype that you wish to convert expression to and it can be one of the following are:
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:
- The value to convert to another datatype.
Style:
- Optional. The format used to convert between datatypes, such as a date format or string format. It can be one of the following values:
Example:
Let's look at some SQL Server CONVERT function examples and explore how to use the CONVERT function in SQL Server (Transact-SQL).
For example:
SELECT CONVERT(int, 14.85);
Result: 14 (result is truncated)
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