| Oracle® Database SQL Reference 10g Release 1 (10.1) Part Number B10759-01 |
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LOWER returns char, with all letters lowercase. 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 lowercase:
SELECT LOWER('MR. SCOTT MCMILLAN') "Lowercase"
FROM DUAL;
Lowercase
--------------------
mr. scott mcmillan