Question

I have a Oracle DB with a table called myC. In this table I have a few row, two of them called myCheight, myCwidth.

I need to read these values and compare them like in IF myCheight > myCwidth DO switch the values.

I tried to read values from one row but didnt get it to work. I use Oracles Oracle SQL Developer.

This is what i came up with so far:

set serveroutput on;
DECLARE 
  cursor h is select * from MyC;
  type htype is table of h%rowtype index by number;

  stage_tab htype;
  master_tab htype;
BEGIN 
  open h;
  loop  
      fetch h bulk collect into stage_tab limit 500;

      for i in 1 .. stage_tab.count loop
          master_tab(stage_tab(i).id) := stage_tabe(i);
      end loop;

      exit when h%notfound;
  end loop;
  close h;

end;

Answer 1

Can’t you just do this?

UPDATE myC
    SET myCheight = myCwidth,
        myCwidth = myCheight
    WHERE myCheight > myCwidth