LOWER (Transact-SQL)

THIS TOPIC APPLIES TO: yesSQL Server (starting with 2008)yesAzure SQL DatabaseyesAzure SQL Data Warehouse yesParallel Data Warehouse

Returns a character expression after converting uppercase character data to lowercase.

Topic link icon Transact-SQL Syntax Conventions

Syntax

-- Syntax for SQL Server, Azure SQL Database, Azure SQL Data Warehouse, Parallel Data Warehouse  

LOWER ( character_expression )  

Arguments

character_expression
Is an expression of character or binary data. character_expression can be a constant, variable, or column. character_expression must be of a data type that is implicitly convertible to varchar. Otherwise, use CAST to explicitly convert character_expression.

Return Types

varchar or nvarchar

Examples

The following example uses the LOWER function, the UPPER function, and nests the UPPER function inside the LOWER function in selecting product names that have prices between $11 and $20. This example uses the AdventureWorks2012 database.

SELECT LOWER(SUBSTRING(Name, 1, 20)) AS Lower,   
   UPPER(SUBSTRING(Name, 1, 20)) AS Upper,   
   LOWER(UPPER(SUBSTRING(Name, 1, 20))) As LowerUpper  
FROM Production.Product  
WHERE ListPrice between 11.00 and 20.00;  
GO  

Here is the result set.

Lower Upper LowerUpper

--------------------- --------------------- --------------------

minipump MINIPUMP minipump

taillights - battery TAILLIGHTS - BATTERY taillights - battery

(2 row(s) affected)

Examples: Azure SQL Data Warehouse and Parallel Data Warehouse

The following example uses the LOWER function, the UPPER function, and nests the UPPER function inside the LOWER function in selecting product names that have prices between $11 and $20.

-- Uses AdventureWorks  

SELECT LOWER(SUBSTRING(EnglishProductName, 1, 20)) AS Lower,   
       UPPER(SUBSTRING(EnglishProductName, 1, 20)) AS Upper,   
       LOWER(UPPER(SUBSTRING(EnglishProductName, 1, 20))) As LowerUpper  
FROM dbo.DimProduct  
WHERE ListPrice between 11.00 and 20.00;  

Here is the result set.

Lower Upper LowerUpper

-------------------- --------------------- --------------------

minipump MINIPUMP minipump

taillights – battery TAILLIGHTS – BATTERY taillights - battery

See Also

Data Types (Transact-SQL)
String Functions (Transact-SQL)