Updating database records in a loop?

Question

declare
begin
  for i in (select * from emp)
  loop
    if i.sal=1300 then
      update emp
      set sal=13000;
    end if;
  end loop;
end;

This code

Answer 1

You need to put a constraint on your update statement.

What you have at the moment will loop through the results rows, and if it finds a row with salary equal to 1300, if then executest he following SQL:

update emp 
set sal=13000;

Without the contraint this updates every row.