Creating a simple query is not a hard task, but creating a complex one, with faceting, local params, parameter dereferencing, and phrase queries can be a challenging task. Other than this, you must remember to write your query while keeping the performance factors in mind. This is why something that is simple at first sight can turn into something more challenging, such as writing a good, complex query. This chapter will try to guide you through some of the tasks you might encounter during your everyday work with Solr.