UPPER()

Available in: DSQL, ESQL, PSQL

Changed in: 2.0

Description: Returns the upper-case equivalent of the input string. Since Firebird 2 this function also correctly uppercases non-ASCII characters, even if the default (binary) collation is used. The character set must be appropriate though: with ASCII or NONE for instance, only ASCII characters are uppercased; with OCTETS, the entire string is returned unchanged.

Result type: (VAR)CHAR

Syntax:

UPPER (str)

Examples:

select upper(_iso8859_1 'Débâcle')
from rdb$database
  -- returns 'DÉBÂCLE' (before Firebird 2.0: 'DéBâCLE')

select upper(_iso8859_1 'Débâcle' collate fr_fr)
from rdb$database
  -- returns 'DEBACLE', following French uppercasing rules