Oracle UPPER() Function

The Oracle (PL/SQL) UPPER() function converts all characters of the given string to uppercase. Any symbol, space, or number in the string is ignored while applying this function. Only alphabet are converted.

Syntax

UPPER(string)

Parameters

string Required. Specify the string to convert to uppercase.

Return Value

Returns the string with all characters of the specified string to uppercase.

Example 1:

The example below shows the usage of UPPER() function.

UPPER('Learning SQL is FUN!')
Result: 'LEARNING SQL IS FUN!'

UPPER('  SQL Tutorial  ')
Result: '  SQL TUTORIAL  '

Example 2:

Consider a database table called Employee with the following records:

EmpID	Name	City	Age	Salary
1	John	London	25	3000
2	Marry	New York	24	2750
3	Jo	Paris	27	2800
4	Kim	Amsterdam	30	3100
5	Ramesh	New Delhi	28	3000
6	Huang	Beijing	28	2800

The query given below is used to convert of column City to uppercase.

SELECT Employee.*, 
UPPER(City) AS City_Uppercase 
FROM Employee;

The query will produce the following result:

EmpID	Name	City	Age	City_Uppercase
1	John	London	25	LONDON
2	Marry	New York	24	NEW YORK
3	Jo	Paris	27	PARIS
4	Kim	Amsterdam	30	AMSTERDAM
5	Ramesh	New Delhi	28	NEW DELHI
6	Huang	Beijing	28	BEIJING

❮ Oracle Functions