NLS_LOWER
Syntax
Purpose
NLS_LOWER returns char, with all letters lowercase.
Both char and 'nlsparam' can be any of the data types CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The string returned is of VARCHAR2 data type if char is a character data type and a LOB if char is a LOB data type. The return string is in the same character set as char.
The 'nlsparam' can have the same form and serve the same purpose as in the NLS_INITCAP function.
See Also:
Appendix C in Oracle Database Globalization Support Guide for the collation determination rules for NLS_LOWER, and for the collation derivation rules, which define the collation assigned to the character return value of this function
Examples
The following statement returns the lowercase form of the character string 'NOKTASINDA' using the XTurkish linguistic sort sequence. The Turkish uppercase I becoming a small, dotless i.
SELECT NLS_LOWER('NOKTASINDA', 'NLS_SORT = XTurkish') "Lowercase"
FROM DUAL;