What Is Null Value in Db2

A null value is a special value that Db2 interprets to mean that no data is present. If you do not specify otherwise,Db2 allows any column to contain null values. Users can create rows in the table without providing a value for the column.

What is null indicator mean?

[′nəl ‚in·də‚kād·ər] (engineering) A galvanometer or other device that indicates when voltage or current is zero; used chiefly to determine when a bridge circuit is in balance. Also known as null detector.

IS null condition in DB2?

The IS NULL condition is satisfied if the column contains a null value or if the expression cannot be evaluated because it contains one or more null values. If you use the IS NOT NULL operator, the condition is satisfied when the operand is column value that is not null, or an expression that does not evaluate to null.