SQL Server DATALENGTH() Function
Example
Return the length of an expression (in bytes):
SELECT
DATALENGTH('W3Schools.com');
Try it Yourself »
Definition and Usage
The DATALENGTH() function returns the length of an expression (in bytes).
Note: The DATALENGTH() function counts both leading and trailing spaces when calculating the length of the expression.
Tip: Also see the LEN() function.
Syntax
DATALENGTH(expression)Parameter Values
| Parameter | Description |
|---|---|
| expression | Required. The data type you wish to return the length for. If expression is NULL, DATALENGTH() will return NULL |
Technical Details
| Works in: | SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005 |
|---|
More Examples
Example
Return the length of an expression (in bytes) (counts both leading and trailing spaces):
SELECT
DATALENGTH(' W3Schools.com ');
Try it Yourself »
Example
Return the length of an expression (in bytes):
SELECT
DATALENGTH('2017-08');
Try it Yourself »
