Want the book? Go get it!This is the first episode in my series “SharePoint Search Queries Explained - The Series”. See the intro post for links to all episodes.
SharePoint 2013 includes two query languages which can be used to formulate your search queries. The Keyword Query Language (KQL) and the FAST Query Language (FQL). KQL is the topic for episode 1 and 2, and is the language you will mostly use when writing search queries, and is aimed at end-users. FQL has some extended capabilities over KQL, but you will usually solve your queries using KQL. FQL is also trickier to execute using the UI/CSOM/REST, but more on that in episode 10.