PLS-00049: bad bind variable 'NEW.NEW_SKILL_DESC' - oracle

Question

When I run the trigger the PLS-00049: bad bind variable 'NEW.NEW_SKILL_DESC' problems occur. The problem occurs in the: New section. This is the first time I am auditing a database query.
CREATE OR REPLACE TRIGGER lds_skill_trig
BEFORE INSERT OR DELETE OR UPDATE ON LDS_SKILL
FOR EACH ROW
ENABLE
DECLARE
v_user VARCHAR2(30);
v_date VARCHAR2(30);
BEGIN
SELECT user, TO_CHAR(sysdate, 'DD/M0N/YYYY HH24:MI:SS')
INTO v_user, v_date FROM dual;
IF INSERTING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc,user_name,
entry_date, operation)
VALUES(:NEW.new_skill_desc, NULL, v_user, v_date, 'Insert');
ELSIF DELETING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc, user_name,
entry_date, operation)
VALUES(NULL, :OLD.new_skill_desc, v_user, v_date, 'Delete');
ELSIF UPDATING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc, user_name,
entry_date, operation)
VALUES(:NEW.new_skill_desc, :OLD.new_skill_desc, v_user, v_date,'update');
END IF;
END;
This is the table for db_lds_skill where the audit record i want to save.
CREATE TABLE DB_LDS_SKILL
(NEW_SKILL_DESC VARCHAR2(30),
OLD_SKILL_DESC VARCHAR2(30),
USER_NAME VARCHAR2(30),
ENTRY_DATE VARCHAR2(30),
OPERATION VARCHAR2(30)
);

Answer 1

It seems you are adding wrong column name in the :NEW.new_skill_desc, in The :new. you have to specific the column for the table LDS_SKILL table, not db_lds_skill
The below I created locally and it was working fine, Note that I replaced to_date with to_char and replaced M0N with MON
drop table db_lds_skill
/
create table db_lds_skill
(new_skill_desc varchar2(100) null,
old_skill_desc varchar2(100) null,
user_name varchar2(100) null,
entry_date varchar2(100),
operation varchar2(100) null
)
/
drop table LDS_SKILL
/
create table LDS_SKILL
(new_skill_desc varchar2(100) null,
old_skill_desc varchar2(100) null,
user_name varchar2(100) null,
entry_date varchar2(100) nulll,
operation varchar2(100) null
)
/
CREATE OR REPLACE TRIGGER lds_skill_trig
BEFORE INSERT OR DELETE OR UPDATE ON LDS_SKILL
FOR EACH ROW
ENABLE
DECLARE
v_user VARCHAR2(30);
v_date VARCHAR2(30);
BEGIN
SELECT user, TO_CHAR(sysdate, 'DD/MON/YYYY HH24:MI:SS')
INTO v_user, v_date FROM dual;
IF INSERTING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc,user_name,
entry_date, operation)
VALUES(:NEW.new_skill_desc, NULL, v_user, v_date, 'Insert');
ELSIF DELETING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc, user_name,
entry_date, operation)
VALUES(NULL, :OLD.new_skill_desc, v_user, v_date, 'Delete');
ELSIF UPDATING THEN
INSERT INTO db_lds_skill(new_skill_desc, old_skill_desc, user_name,
entry_date, operation)
VALUES(:NEW.new_skill_desc, :OLD.new_skill_desc, v_user, v_date,'update');
END IF;
END;
/
insert into LDS_SKILL (new_skill_desc) values('pp')
/
commit
/