write a section of code that per forms a bulk collect which makes use of the following explicit cursor. cursor c_dat is select * from table

To perform a bulk collection using an explicit cursor named `c_dat` in PL/SQL, you would first declare the cursor, then loop through the data, and finally use the `BULK COLLECT INTO` clause to store the fetched rows into a collection. Here's an example:

DECLARE
  TYPE RecordType IS TABLE OF table%ROWTYPE;
  v_record Collection.RecordType;
BEGIN
  -- Declare the cursor
  OPEN c_dat;

  -- Loop through the cursor and bulk collect the rows
  LOOP
    FETCH c_dat BULK COLLECT INTO v_record LIMIT 100; -- Fetch up to 100 rows at a time
    EXIT WHEN c_dat%NOTFOUND; -- Exit the loop when no more rows left

    -- Process the collected rows if necessary (e.g., validation or transformation)
    FOR i IN 1..v_record.COUNT LOOP
      -- Do something with v_record(i)
    END LOOP;
  END LOOP;

  -- Close the cursor after looping
  CLOSE c_dat;

  -- Optionally, commit any transaction or handle the collection outside the block
  COMMIT;

END;
/

In this example, `RecordType` is a user-defined type based on the `table`'s row type, and `v_record` is an instance of that type initialized as a collection. The `FETCH BULK COLLECT INTO` statement fetches a limited number of rows at a time and stores them in the `v_record`. Make sure to adjust the `LIMIT` value according to your system's memory constraints and desired performance.