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SQL Server LEN() Function

Return the length of a string

Definition and Usage

The LEN() function returns the length of a string.

Note: Trailing spaces at the end of the string is not included when calculating the length. However, leading spaces at the start of the string is included when calculating the length.
Tip: Also look at the DATALENGTH() function.

Syntax

LEN(string)

Parameter Values

Parameter Description
string Required. The string to return the length for. If string is NULL, it returns NULL

Technical Details

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

More Examples

Example

Return the length of a string (counts leading spaces, but not trailing spaces):

SELECT LEN(' W3C ');

Example

Return the length of a string:

SELECT LEN('2017-08');

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