SQL UPPER() function

UPPER() function

The SQL UPPER() function is used to convert all characters of a string to uppercase.

Syntax:

 UPPER(string) 

PostgreSQL, MySQL, SQL Server and Oracle

All of above platforms support the SQL syntax of UPPER().

Parameters:

Pictorial Presentation:

Application of UPPER()

In the subsequent pages, we have discussed how to apply UPPER() with various SQL clauses. we have used Oracle 10g Express Edition.

Example:

To get string the 'testing for upper function' in upper case from the DUAL table, the following SQL statement can be used :

SQL Code:

SELECT UPPER('testing for upper function') 
AS Testing_Upper 
FROM dual;

In the above example 'Testing_Upper' is a column alias which will come as a column heading to the output.

Output:

TESTING_UPPER
--------------------------
TESTING FOR UPPER FUNCTION

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