Select the data in a table and update in another table

Dear experts,

create the table TB_ENCRYPT

(

Identification number,

Varchar2 (200) KEY

);

INSERT INTO TB_ENCRYPT VALUES(1,'HJUVHDUIFBSDGVU');

SELECT * FROM TB_ENCRYPT;

1 HJUVHDUIFBSDGVU

create TABLE users)

username, NUMBER of

password VARCHAR2 (200)

);

Insert users

values (1, 123 # "")

Insert users

values (2, 456 #')

Select * from users;

1 123 #.

# 2 456

I want to select the data KEY for table TB_ENCRYPT column and update in the column of tables for the respective key user password

TB_ENCRYPT table contains only a single key value. Comparing this key, I want to update the old value of the key to the new value.

For encryption and decryption I followed the java class method.no is worried about that.

create or replace

PACKAGE PCK_ENC AUTHID CURRENT_USER AS

FUNCTION DECRYPT (VARCHAR arg0, arg1 VARCHAR) AS VARCHAR BACK LANGUAGE JAVA NAME 'Encrclass.decrypt (java.lang.String, java.lang.String) return java.lang.String ';

FUNCTION ENCRYPT (VARCHAR arg0, arg1 VARCHAR) AS VARCHAR BACK LANGUAGE JAVA NAME 'Encrclass.encrypt (java.lang.String, java.lang.String) return java.lang.String ';

END;

SELECT PCK_ENC. ENCRYPT('1234','HJUVHDUIFBSDGVU') FROM DUAL;

HERE,

1234 - is the password of the users table column data

HJUVHDUIFBSDGVU - represents the key of table TB_ENCRYPT column data.

Comparing this key, I want to update the old value of the key to the new value.

I tried with this method

declare

cursor c1 is

Select the key

of TB_ENCRYPT

where id = 1

update the id;

Start

for c1_rec looping c1

update users

password is PCK_ENC. Encrypt (Password, Key)

the location being c1;

commit;

end loop;

end;

Help, please

You can use the MERGE statement.

merge into users
using tb_encrypt
   on (id = userid)
  when matched then
      update set password = PCK_ENC.ENCRYPT(password,key);

And why you encrypt your password. This isn't a good idea. Just password hash.

Tags: Database

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