PLSQL | LOWER Function

The PLSQL LOWER function is used for converting all letters in the specified string to lowercase. If there are characters in the string that are not letters, they are unaffected by this function.

The char to be converted can be any of the datatypes such as CHAR, VARCHAR2, NCHAR, NVARCHAR2, CLOB, or NCLOB. The value returned by the LOWER function is the same datatype as char. The database sets the case of the characters based on the binary mapping defined for the underlying character set.

Syntax:

LOWER( string )

Parameters Used:

string – It is used to specify the string which needs to be converted.

Supported Versions of Oracle/PLSQL:

1. Oracle 12c
2. Oracle 11g
3. Oracle 10g
4. Oracle 9i
5. Oracle 8i

Example-1:

DECLARE 
   Test_String string(20) := 'Geeksforgeeks';
   
BEGIN 
   dbms_output.put_line(LOWER(Test_String)); 
   
END;  

Output:

geeksforgeeks 

Example-2:

DECLARE 
   Test_String string(20) := 'GEEKSFORGEEKS';
      
BEGIN 
   dbms_output.put_line(LOWER(Test_String)); 
   
END; 

Output:

geeksforgeeks 

Example-3:

DECLARE 
   Test_String varchar2(30) := 'GEEKSFORGEEKS12345';
      
BEGIN 
   dbms_output.put_line(LOWER(Test_String)); 
   
END; 

Output:

geeksforgeeks12345