PL/SQL tutorial 16: Table Auditing using DML Triggers in Oracle PL/SQL

Learn Table Auditing using DML Triggers in Oracle Database and Increase the level of security by keep an eye on user tempering your table data.
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This is Manish from


Navneil Naicker says:

That’s cool

siva krishna says:

for a table with single column it’s ok but what if for a table with number of columns.. i mean for old and new values.

Neha Sharma says:

while creating audit trigger for a table with multiple columns if i need to insert column name which is updated into audit table, how can u do that?

Suvrojoti bhunia says:

Can we make this trigger on a view and not directly on the main table?

Kiran Kumar Jonnalagadda says:

after execution of trigger CREATE  or REPLACE  TRIGGER  superheroes_audit
  v_user  varchar2(30);
  v_date  varchar2(30);
  SELECT user, TO_CHAR(sysdate, ‘DD/MON/YYYY HH24:MI:SS’) INTO v_user, v_date FROM dual;

   INSERT INTO sh_audit (new_name,old_name, user_name, entry_date, operation)
   VALUES(:NEW.SH_NAME, Null , v_user, v_date, ‘Insert’);

   INSERT INTO sh_audit (new_name,old_name, user_name, entry_date, operation)
   VALUES(NULL,:OLD.SH_NAME, v_user, v_date, ‘Delete’);

   INSERT INTO sh_audit (new_name,old_name, user_name, entry_date, operation)
   VALUES(:NEW.SH_NAME, :OLD.SH_NAME, v_user, v_date,’Update’);

I am getting following error :

Error starting at line : 7 in command –
v_date  varchar2(30)
Error report –
Unknown Command

SP2-0552: Bind Variable “NEW” is not declared.

PL/SQL procedure successfully completed.

anitha reddy says:

in trigger i want to insert the a row information which been having old date into another table but condition is 1st having only five records if u insert 6th record then that one is delete how tell me condition anyone plz

Islarf says:

WHat was the “:NEW”, “:OLD”. I tried executing this code and it wanted binds or something.

esona dotwana says:

Awesome staff thumbs up enjoying your tutorials

haribabu kallagunta says:

can you please give us a video on table audit trigger
about the table having multiple columns

Vishal Suryavanshi says:

MANISH…… Question,
where does sh_name comes from?? and m facing error Trigger is invalid :/

Doom Slayer says:

This worked for me. Excellent!

Luis Agustin Ferreras Recio says:

Hi, excelent video, i want to know how to make this for any change in any column from table or for any table in complete schema.

Antriksh Kethwas says:

helpful af

Sandeep Panda says:

I have one doubt- I dont see that the dbms_output.put_line is mentioned anywhere in the code than how the output is showing as one row is inserted by HR?

Azkia Mumarisatul Haq says:

thank you very much manish from rebelion rider

Pallavi Chatrath says:

sir pls upload procedre videos as soon as possible after trigger and upload the interview questions with answer

Chandana Pradeep says:

i have a doubt in select user line….what does the dual mean?????????????

ebiware gbenmo says:

how can i get a code to audit trigger that works with loop ,

akanksha dixit says:

why are u using here superheroes table instead of sh_audit table?

Abdul majeed says:

Can we use :old and :new if we use after in trigger?

balram pandey says:

hello, sir I am getting this following error while compiling script of complex trigger for auditing.
Error report:
Unknown Command
Bind Variable “NEW” is NOT DECLARED
anonymous block completed

асыл балгабай says:

where you created superheroes table

Jose Nardulli says:

Thanks for the tutorials manish, are you planing on doing one on FORMS and REPORTS, from installation and everything, if you do ill be very interested

sanju m says:

Shame on those who dislike the video…

Yves Rivera says:

Why are we using “BEFORE” on DML when we are actually checking “AFTER” the DML was executed?

srabana behera says:

Hi manish
I have question
Q) let’s consider a string ‘SRABANA KUMAR BEHERA’
i want to bring 2 character from each word like ‘SRKUBE’ how can I?

Gulzar siddique says:

sir if want to audit whole table ???
can i use :OLD.table_name ????

or is there any other trick to audit more than one column in a table???


abdalla afq says:

its work but the message (one row inserted by hr ) not showing what i should i do

Merry Anne Barolo says:

If I have many users on my application how can I know who the REAL user that inserted or updated the data on the table?

Abdul majeed says:

Awesome Best stuff for learning PL SQL and SQL . Really great work especially in this video as showing the real time use boosts my interest further. I am watching all the videos in the playlist of PL SQL

ZATKOP6287 says:

Your awesome man …!!!!

Debajyoti Dutta says:

What happens if HR user rollbacks a DML operation done?

mihir kar says:

Below error occer when i try to process dml on a table which also has a trigger in same table
the requrement based on after dml how to handel such senario .

3 ON triggertest
5 declare
6 pragma autonomous_transaction;
9 insert into triggertest (ib,id) values(user,sysdate);
10 elsif UPDATING then
11 insert into triggertest(ub,ud) values(user,sysdate);
12 end if;
13 commit;
14* END;
SQL> /

Trigger created.

SQL> insert into triggertest(empno,ename,sal) values(1234,’JAMES’,890);
insert into triggertest(empno,ename,sal) values(1234,’JAMES’,890)
ERROR at line 1:
ORA-00036: maximum number of recursive SQL levels (50) exceeded
ORA-06512: at “SCOTT.AUTOINSERT”, line 5
ORA-04088: error during execution of trigger ‘SCOTT.AUTOINSERT’
ORA-06512: at “SCOTT.AUTOINSERT”, line 5
ORA-04088: error during execution of trigger ‘SCOTT.AUTOINSERT’
ORA-06512: at “SCOTT.AUTOINSERT”, line 5
ORA-04088: error during execution of trigger ‘SCOTT.AUTOINSERT’
ORA-06512: at “SCOTT.AUTOINSERT”, line 5

alo doli says:

this tutorial was simply godlike

bengalifob2 says:

You’re better than my textbook and crappy college instructor combined

LogicalX says:


Vivek says:

nice explanation but i want how debugging the pl/sql code and how to return more than one value by using ref cursor.. pls upload that related videos.. :)

Slobodan Tajisic says:

Thanks Manish. Learning from your tutorials is a real pleasure…

karishma shrestha says:

best tutorial thankyou so much :)

varun dwivedi says:

sir here what is the difference between using triggers or simply using DML like insert delete and update commands …please help me.

Qorxmaz Meherremov says:


Gulzar siddique says:

sir , can we use multiple source column names in this program??????

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