NULL Keyword

This example demonstrates how to use the NULL keyword in template filters. The NULL keyword allows you to filter records where a field value is NULL (missing) or NOT NULL. - **= NULL**: Matches records where the field is null (DBNull.Value or native null). - **<> NULL**: Matches records where the field is not null. - The NULL keyword is case-insensitive (NULL, null, Null are all valid). - Empty string "" is NOT considered NULL. - NULL can be combined with other conditions using AND / OR / NOT.