History field Requirement

Question

I have the requirement for a filed that inputs comments (manditory) when changes are made to a record. For this I have created a text field on the form and it writes to a clob column on the table. It works ok but with one exception.
the way the information is stored is that it is placed in the bottom of the form. This meens to find the latest comments you have to scroll to the bottom of the file.
Has anyone out there managed to create a history field with the latest comments at the top?
Cheers
Bjorn

Answer 1

Here's how I did it. Not sure where yours differs:
DROP TABLE BENTEST;
CREATE TABLE BENTEST( SOME_DATA NUMBER PRIMARY KEY, X CLOB );
CREATE OR REPLACE TRIGGER UPDATE_HISTORY_DETAILS
BEFORE UPDATE ON BENTEST
FOR EACH ROW
BEGIN
:NEW.X := :NEW.X || ' ' || :OLD.X;
END;
INSERT INTO BENTEST VALUES ( 1, 'Hello' );
SELECT X FROM BENTEST;
X                                                                              
Hello        
UPDATE BENTEST SET X = 'WORLD' WHERE SOME_DATA = 1;
SELECT X FROM BENTEST;
X                                                                              
WORLD Hello
DROP TRIGGER UPDATE_HISTORY_DETAILS
CREATE OR REPLACE TRIGGER UPDATE_HISTORY_DETAILS
BEFORE UPDATE ON BENTEST
FOR EACH ROW
BEGIN
:NEW.X := :OLD.X || ' ' || :NEW.X;
END;
UPDATE BENTEST SET X = 'END' WHERE SOME_DATA = 1;
SELECT X FROM BENTEST;
X                                                                             
WORLD Hello END    Message was edited by:
Benjamin Wootton