Oracle® Database SQL Language Reference 11g Release 2 (11.2) Part Number E17118-04 |
|
|
PDF · Mobi · ePub |
UPPER
returns char
, with all letters uppercase. char
can be any of the data types CHAR
, VARCHAR2
, NCHAR
, NVARCHAR2
, CLOB
, or NCLOB
. The return value is the same data type as char
. The database sets the case of the characters based on the binary mapping defined for the underlying character set. For linguistic-sensitive uppercase, refer to NLS_UPPER.
The following example returns each employee's last name in uppercase:
SELECT UPPER(last_name) "Uppercase" FROM employees;