Oracle NLS_UPPER function

Last update on August 19 2022 21:50:41 (UTC/GMT +8 hours)

Description

The NLS_UPPER function is used to return all letters of a given string in uppercase.

Note : National Language Support (NLS) is a technology enabling Oracle applications to interact with users in their native language, using their conventions for displaying data.

Syntax:

NLS_UPPER(string1 [, 'nlsparam' ])

Parameters:

Name	Description	Data Types
string1	A string whose characters will be converted to uppercase.	CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB
nlsparam	The value of 'nlsparam' can have this form : 'NLS_SORT = sort' where sort is either a linguistic sort sequence or BINARY. The linguistic sort sequence handles special linguistic requirements for case conversions. These requirements can result in a return value of a different length than the char. If you omit 'nlsparam', then this function uses the default sort sequence for your session.

Return Value Type

VARCHAR2

Examples: Oracle NLS_UPPER function

The following example returns a string with all the letters converted to uppercase:

SELECT NLS_UPPER('w3resource') "Uppercase"
FROM DUAL;

Sample Output:

Uppercase
----------
W3RESOURCE

Previous: NLS_LOWER
Next: NLSSORT