Interchange of data between two rows.

Question

I have a table Test. In it there are 2 rows.Primary key of first row is A and primary key of second row is B.
I want to interchange the data.
I mean data of A in B and data of B in A.
Pls help..

Answer 1

Hi,
I would write a stored procedure in pl/sql that takes in input the two Id issues two select and create a record of type and use the local variable as swap area.
something like
create table cod_test(id varchar2(10), value varchar2(20));
create or replace procedure swap(id_1 in varchar2, id_2 in varchar2) is
       rec_1 cod_test%rowtype;
       rec_2 cod_test%rowtype;
       rec_swap cod_test%rowtype;
begin
  select * into rec_1 from cod_test where id=id_1;
  select * into rec_2 from cod_test where id=id_2;
  rec_swap.id:=rec_1.id;
  rec_swap.value:=rec_1.value;
  update cod_test set value=rec_2.value where id=id_1;
  update cod_test set value=rec_swap.value where id=id_2;
end swap;
insert into cod_test (id,value) values('1','one');
insert into cod_test (id,value) values('2','two');
exec swap('1','2');
select * from cod_test;it's a simple test, take it as a starting point (add exception management for example).
ciao,
Giovanni