How to check username password is valid?

I write the following code in "WHEN-BUTTON-PRESSED" trigger... Is this good code?

declare
username varchar2 (40);
PSW varchar2 (40);
uidd varchar2 (40);
pass varchar2 (40);

cursor log_cur is
Select emp_id, emp_name, password
of emp_details
where emp_id = userid;

Start
UserID: =: ID;
PSW: =: PASSWORD;
Open log_cur;
extract log_cur in uidd, pass;
If the user name is null then
message ("' enter valid username");
end if;
If psw is null then
message ('Enter valid password');
end if;

if(log_cur%NotFound) then
message ("name of invalid user or password");
elsif (userid = uidd and psw = pass) then
message ('Welcome');
end if;

Hello

First U must not use a cursor, explicit...!

You can use only the statements select anyway, you can use...

Declare

   user_id           VARCHAR2(40);
   pass_word       VARCHAR2(40);

CURSOR log_cur is
SELECT emp_id,password
FROM  emp_details
WHERE emp_id=  user_id ;

BEGIN

 user_id           :=:ID;
pass_word       :=:PASSWORD;

OPEN log_cur;

-----====---------------------Null Values Validation-----------------------------====---

FETCH log_cur INTO user_id           , pass_word ;

IF user_id   IS NULL THEN

    MESSAGE('pls Enter the user id ');

    SYNCHRONIZE; -- TO WORKS AS AN aLERT

END IF;

IF pass_word  IS NULL THEN

MESSAGE (pls Enter the pass word');

 SYNCHRONIZE; -- TO WORKS AS AN aLERT

END IF;

-----====---------------------Invalid Values Validation-----------------------------====---

IF (log_cur%NOTFOUND)THEN

MESSAGE ('Invalid Data Pls Check ur user id or Password');

 SYNCHRONIZE;

ELSIF (user_id  =emp_id ) THEN 

MESSAGE ('Valid User Pls Enter ur Pass Word');
SYNCHRONIZE;

ELSIF ( pass_word = password )then

MESSAGE ('Valid PassWord Entery, Welcome to Your Application (or) Hello ' || user_id );
SYNCHRONIZE;

end if;

CLOSE log_cur ;

u sew validate the values NULL and invalid values in a separate normal select statements

But am glad you are trying to write your own code and I'm trying to help you improve I can...!

am sure there are better development; But it's a start, we try to step with a not to write your own code...

Good job Battistelli :)

Hope this helps u...

Kind regards

Abdetu...

Tags: Oracle Development

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