Unix systems make it easy to make output that you don’t want to see simply disappear. Toss output into the void. Send errors in one direction, useful output in another. Something of a bit bucket, ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

You can define data fields to not store null data by specifying the NU option in data definition statements. In normal data storage (that is, NU not specified), a null value is represented by two ...

This article is also available as a PDF download. Where errors are concerned, null values are an equal-opportunity menace. If an unhandled null value doesn’t generate a runtime error, it’ll show up in ...