Q — Query languages

EQL = Event Query Language SQL = Structured Query Language LQL = Logical Query Language GQL = Graph Query Language

refs: https://tdop.github.io/ https://howqueryengineswork.com/01-what-is-a-query-engine.html https://paperhub.s3.amazonaws.com/dace52a42c07f7f8348b08dc2b186061.pdf https://en.wikipedia.org/wiki/Graph_Query_Language https://code.kx.com/q https://docs.xtdb.com/reference/main/xtql/queries.html https://neo4j.com/docs/cypher-manual https://eql.readthedocs.io/en/latest/ https://clojure.github.io/clojure-contrib/doc/datalog.html https://www.researchgate.net/publication/2850953_Soft_Stratification_for_Magic_Set_Based_Query_Evaluation_in_Deductive_Databases http://sieve.info/ https://www.researchgate.net/publication/221542994_SARI-SQL_Event_query_language_for_event_analysis https://www.elastic.co/guide/en/elasticsearch/reference/current/eql.html https://www.youtube.com/watch?v=8XUutFBbUrg https://www.scryer.pl/ https://github.com/inconvergent/cl-grph https://jakewheat.github.io/sql-overview/ https://github.com/ronsavage/SQL https://web.csulb.edu/colleges/coe/cecs/dbdesign/dbdesign.php https://github.com/nikodemus/screamer https://github.com/defunkydrummer/cl-gambol https://www.lispworks.com/products/knowledgeworks.html https://namin.seas.harvard.edu/files/namin/files/sql2c_jfp.pdf https://scala-lms.github.io/tutorials/query.html