Initial value of an empty column in a row of a database table. Null values can be processing using Native SQL statements, but they have no equivalent as the content of data objects in ABAP. Only the WHERE addition enables a special condition IS NULL for null values. Changing Open SQLstatements (INSERT, UPDATE, MODIFY) generally do not create null values, provided that you are not processing a view that does not comprise all columns of a database table. However, depending on the database system, you can also display empty strings as null values. Null values can still arise in database tables if the new columns are appended to filled tables. When reading with the Open SQL statement SELECT, null values can be created by aggregate functions or an outer join, but they are converted to initial values of the correct type when passed to data objects.