Release 10.1A: OpenEdge Development:
Progress 4GL Handbook

Why you use queries in your application

The first question to answer about queries is why Progress has them at all. For many years, the Progress 4GL did not support queries, and developers wrote very powerful and complete applications without them. So, before you go into the details of how to define and use queries, you’ll learn the differences between queries and the block-oriented data access language you’ve used so far.