SQL Server: LOWER Function

This SQL Server tutorial explains how to use the LOWER function in SQL Server (Transact-SQL) with syntax and examples.


In SQL Server (Transact-SQL), the LOWER function converts all letters in the specified string to lowercase. If there are characters in the string that are not letters, they are unaffected by this function.


The syntax for the LOWER function in SQL Server (Transact-SQL) is:

LOWER( string )

Parameters or Arguments

The string to convert to lowercase.


Applies To

The LOWER function can be used in the following versions of SQL Server (Transact-SQL):

  • SQL Server 2017, SQL Server 2016, SQL Server 2014, SQL Server 2012, SQL Server 2008 R2, SQL Server 2008, SQL Server 2005


Let’s look at some SQL Server LOWER function examples and explore how to use the LOWER function in SQL Server (Transact-SQL).

For example:

Result: 'techonthenet.com'

SELECT LOWER('TechOnTheNet.com');
Result: 'techonthenet.com'

SELECT LOWER('Tech on the Net');
Result: 'tech on the net'