UPPER function

Converts a string to uppercase. UPPER supports UTF-8 multibyte characters, up to a maximum of four bytes per character.

Syntax

UPPER(string)

Arguments

string

The input parameter is a VARCHAR string (or any other data type, such as CHAR, that can be implicitly converted to VARCHAR).

Return type

The UPPER function returns a character string that is the same data type as the input string.

Examples

The following example converts the CATNAME field to uppercase:

select catname, upper(catname) from category order by 1,2;

 catname  |   upper
----------+-----------
Classical | CLASSICAL
Jazz      | JAZZ
MLB       | MLB
MLS       | MLS
Musicals  | MUSICALS
NBA       | NBA
NFL       | NFL
NHL       | NHL
Opera     | OPERA
Plays     | PLAYS
Pop       | POP
(11 rows)