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query_language (794B)


      1 # Query language
      2 
      3 - [conjunctive_query]
      4   - [sjfcq]
      5 - [union_of_conjunctive_queries]
      6 - [first_order_logic]: [first_order_query]
      7 - [monadic_second_order_logic]
      8 
      9 ## Other formalisms
     10 
     11 - [ontology_mediated_query]
     12 - [relational_calculus] / [relational_algebra]
     13   - [nested_relational_calculus]
     14   - nested [k_relation]
     15 - [graph_query_languages]
     16 
     17 ## Features
     18 
     19 - [query_recursive]
     20   - [regular_path_query]
     21   - [datalog]
     22     - with [negation]
     23     - with [aggregation]
     24 - [aggregation]
     25 - [query_inequality]
     26 
     27 ## Subclasses
     28 
     29 - [homomorphism_closed]
     30 - [query_acyclic]
     31   - [datalog_acyclic]
     32   - [conjunctive_query_acyclic]
     33 - [query_full]
     34   - [conjunctive_query_full]
     35 
     36 ## Variants
     37 
     38 - [sum_product_query]
     39 
     40 Up: [database_theory]
     41 
     42 See also: [query_rewriting]
     43 
     44 Aliases: query class, query classes, query languages