source: https://retool.com/pipes
Yahoo Query Language (YQL) was a company mandate to produce services with common endpoints for queries across Yahoo products.
YQL allowed for Yahoo-wide mashups, and ultimately let developers outside the company even store the results of queries in SQL tables at Yahoo. Effectively, it tried to turn Yahoo into a platform for other websites, while leveraging the advantage for new internal offerings and combinations. You could see this as a flicker (not Flickr) of what Amazon Web Services would ultimately offer: a way to offload certain kinds of programming structures and resources to a specialty provider instead of building out the tools and services on one’s own data center servers.