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Applies to: 
 SQL Server 
 Azure SQL Database 
 Azure SQL Managed Instance 
 Azure Synapse Analytics 
 Analytics Platform System (PDW) 
 SQL analytics endpoint in Microsoft Fabric 
 Warehouse in Microsoft Fabric
Returns a character expression with lowercase character data converted to uppercase.
 Transact-SQL syntax conventions
Syntax
UPPER ( character_expression )  
Arguments
character_expression
Is an expression of character data. character_expression can be a constant, variable, or column of either character or binary data.
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 UPPER and RTRIM functions to return the last name of people in the dbo.DimEmployee table so that it is in uppercase, trimmed, and concatenated with the first name.
-- Uses AdventureWorks  
  
SELECT UPPER(RTRIM(LastName)) + ', ' + FirstName AS Name  
FROM dbo.DimEmployee  
ORDER BY LastName;  
Here is a partial result set.
Name
------------------------------
ABBAS, Syed
ABERCROMBIE, Kim
ABOLROUS, Hazem
See Also
Data Types (Transact-SQL)
String Functions (Transact-SQL)
LOWER (Transact-SQL)