Oracle® Database SQL Reference 10g Release 1 (10.1) Part Number B10759-01 |
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UPPER
returns char
, with all letters uppercase. char
can be any of the datatypes CHAR
, VARCHAR2
, NCHAR
, NVARCHAR2
, CLOB
, or NCLOB
. The return value is the same datatype as char
.
The following example returns a string in uppercase:
SELECT UPPER('Large') "Uppercase" FROM DUAL; Upper ----- LARGE