This tutorial introduces the basic concepts of null handling for string and numeric columns in Apache Druid. The tutorial focuses on filters using the logical NOT operation on columns with NULL values ...

1. WE JUST INSERT AS NULL -> WE CANT DIRECTLY CHECK PHONE = NULL. 2. IF WE INSERT AS 'NULL' -> THEN IT IS LOOK LIKE STRING THEN WE CAN CHECK PHONE = NULL. 3. SO IF WE INSERT AS NULL -> THEN WE USED IS ...