One of the trickiest aspects of relational database management can be dealing with missing information. The standard method of representing missing information is to set the “value” to null. A null ...

I'm getting a date from an Access database as part of a SELECT query.<BR>Sometimes in the database, this field is left blank.<BR>In these case, writing the field to the asp page gives me ...

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 ...

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, ...

When databases are designed, they serve as semantic expressions of the organizations that employ them. Those expressions describe the data items of importance and articulate the business rules as the ...

Have you ever stared at a massive dataset, only to realize it’s riddled with empty columns that serve no purpose? It’s a frustrating scenario—one that wastes time, clutters your workflow, and makes ...