Question

I want to Check the value of data Before insertion in a table.Like ,if things like ” or & come in the data,it should ignore it or insert using some escape sequence .

create table test (checkit varchar2(40));
insert into test values("Here is the & test data");

or

insert into test values("Here is the " test data");

Is there a way to do that in oracle?
thanks

EDIT

I want to know the solution especially for Characters like & , ” etc not for normal data as shown in the example.

Answer 1

You can do it using BEFORE trigger.

---

Here is an example replacing & with & and ” with &quot;

SET DEFINE OFF;
drop table test;
create table test (checkit varchar2(60));


CREATE OR REPLACE TRIGGER validateTest
  BEFORE DELETE OR INSERT OR UPDATE ON test
  FOR EACH ROW
BEGIN
  :new.checkit := replace(:new.checkit, '&', '&lte;');
  :new.checkit := replace(:new.checkit, '"', '"');
END;
/

insert into test (checkit) values ('Here is the & test "data"');
select * from test;

Output:

drop table test succeeded.
create table succeeded.
TRIGGER validateTest Compiled.
1 rows inserted
CHECKIT                                                      
------------------------------------------------------------ 
Here is the &lte; test "data"                    

1 rows selected

Obviously replacement strings can be whatever.