The Yahoo! Query Language is an expressive SQL-like language that lets you query, filter, and join data across Web services.
YQL’s possibilities are virtually endless, say you want to get specific Flickr Images containing a defined word in the title, or you want to geo-code some addresses on the fly. YQL makes those tasks extremely easy by just forming a simple query that gathers the data. Output can be switched between JSON and XML, so you can choose whatever fits best for your application.
The best way to go about using a YQL service is as follows:
- Construct your query using the YQL Console and try out if it gives you the right result.
- Copy the REST Query URL the console gives you at the bottom and insert it into your web app. There are even examples in the documentation on how to use REST queries in different programming environments.