Over the past few years, there has been a subtle but significant shift in the way that data is structured in databases. Whereas yesterday’s databases were typically limited to storing data in rows and ...

To illustrate, consider the SAS table WORK.EMPLOYEES, created with the following DATA step program: data employees; input fname $ 1-9 lname $ 10-18 position $ 19-28 salary 29-34; datalines; Walter ...