duplicates of records in the table

Hello
I have the following type and I need to delete duplicate records

     declare
          type x_object_type is table of number
          index by binary_integer;
          x_table x_object_type;
          idx number;
     begin
           select manager_id bulk collect into x_table
          from employees
          where rownum <= 6;
          idx := x_table.first;
          for i in x_table.first..x_table.last loop
               if idx = x_table.next(i) then
                 dbms_output.put_line('it is a duplicate');
               else 
                 dbms_output.put_line('no duplicate '||x_table(i));     
               end if;
          idx := x_table.next(i);
          end loop;
     end;

the result is:
no duplicate 207
no duplicate 124
no duplicate 101
no duplicate 100
no duplicate 201
no duplicate 101

as you can see I have duplicated lines. This is an example, the values in the table are not stored in a table to eliminate using rowid.

Thank you

Hi coco problem already solved?
In my view, that there are some problems in comparison. Try this:

declare
          type x_object_type is table of number
          index by binary_integer;
          x_table x_object_type;
          idx number;
    dup boolean;

     begin
           select manager_id bulk collect into x_table
          from hr.employees
          where rownum <= 6;
          --idx := x_table.first;
          for i in x_table.first..x_table.last-1 loop
    idx := x_table(i);
    --dbms_output.put_line('Now checking '||idx||' for duplicates.');
    dup := false;
        for a in x_table.first..x_table.last loop
          if idx = x_table(a) and a != i then
            dup := true;
          end if;
        end loop;
       IF dup then
         dbms_output.put_line('it is a duplicate: '||x_table(i));
        else
         dbms_output.put_line('no duplicate: '||x_table(i));
       END IF;
    end loop;
     end;
/

You choose the first value and then wrap well than all the others. If you need 2 loops and this "idx: = x_table.first;" the nr of the table not returns.

But, as a suggestion, use a table function. It's more fun:

CREATE TYPE numset_t IS TABLE OF NUMBER;

CREATE OR REPLACE FUNCTION GET_manager_id RETURN numset_t PIPELINED
IS
BEGIN

FOR i in (select manager_id
     from employees
     where rownum <= 6 AND manager_id IS NOT NULL) LOOP
       PIPE ROW(i.manager_id );
     END LOOP;
  RETURN;
END;
/

select a.column_value,count(*) from
(SELECT DISTINCT column_value FROM table(GET_manager_id())) a
INNER JOIN table(GET_manager_id()) b
ON a.column_value = b.column_value
group by a.column_value
order by a.column_value;

If the code is much easier and you have total flexibility, SQL.

-andy

Tags: Database

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