In this post, we'll apply security technologies for stored data. It's helpful to remember that we can't depend upon underlying infrastructure to secure data in the cloud, so we are focused on applying ...

A first-come, first-served technique for managing data in a multiuser environment. The first user to access the file or data record prevents, or locks out, other users from accessing it. After the ...

Designing and implementing a proper database for application development is a complex and time-consuming task. The choices made during database and application design will impact the usefulness of the ...

An explicit lock provides the needed protection. Before the first DATA step, execute a LOCK statement to acquire exclusive access to the file. If exclusive access cannot be obtained, the LOCK ...