How to delete null elements from nested table in oracle?

@orpha 

You can delete null elements from a nested table in Oracle using the following steps:

1. Use the DELETE method to remove the null elements from the nested table. You can use the DELETE method in combination with the TRIM function to remove the null elements.
2. Here is an example of how you can delete null elements from a nested table in Oracle:

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DECLARE
  TYPE NestedTableType IS TABLE OF VARCHAR2(100);
  nt NestedTableType := NestedTableType('A', null, 'B', null, 'C');

BEGIN
  FOR i IN nt.FIRST .. nt.LAST LOOP
    IF nt(i) IS NULL THEN
      nt.DELETE(i);
    END IF;
  END LOOP;
END;

In this example, we have a nested table nt containing elements 'A', null, 'B', null, 'C'. We loop through the elements of the nested table and use the DELETE method to remove the null elements.

After running the above code, the nested table nt will only contain elements 'A', 'B', 'C' without any null elements.