O'Reilly logo

Getting Started with Oracle Event Processing 11g by Lloyd Williams, Robin J. Smith, Alexandre Alves

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Summary

CQL is a powerful language for performing event processing. In this chapter, you learned the foundations of CEP, one important aspect of which is the difference between streams and relations. You can now convert a stream to a relation by applying window operations. CQL supports several useful Window operators such as tuple-based windows, time-based windows, and partitioned windows. You can also convert a relation to a stream by using the ISTREAM, DSTREAM, and RSTREAM operations.

When using relations, you can apply most SQL operations, such as joins, aggregations, and ordering. The main difference is that these operations are executed in a continuous form.

We also learned how CQL native types are similar to that of Java and the RDBMS, and ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required