{"id":9018,"date":"2020-07-31T11:50:58","date_gmt":"2020-07-31T18:50:58","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=9018"},"modified":"2025-12-19T00:58:52","modified_gmt":"2025-12-19T08:58:52","slug":"comparing-mql-features-in-mongodb-4-4-with-n1ql-features-in-couchbase-6-5","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/es\/comparing-mql-features-in-mongodb-4-4-with-n1ql-features-in-couchbase-6-5\/","title":{"rendered":"Comparaci\u00f3n de las caracter\u00edsticas de MongoDB MQL con N1QL en Couchbase 6.5"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Esta es una breve nota revisando las caracter\u00edsticas del lenguaje MongoDB MQL destacadas en el blog de la versi\u00f3n: <\/span><a href=\"https:\/\/www.mongodb.com\/blog\/post\/mongodb-44-userdriven-engineering-ready\"><span style=\"font-weight: 400;\">MongoDB 4.4: Ingenier\u00eda orientada al usuario. Listo para usted<\/span><\/a><span style=\"font-weight: 400;\">.  La versi\u00f3n 4.4 de MongoDB ha a\u00f1adido una serie de caracter\u00edsticas para el lenguaje MQL. <\/span><a href=\"https:\/\/docs.couchbase.com\/server\/6.5\/introduction\/whats-new.html\"><span style=\"font-weight: 400;\">Couchbase lanza la versi\u00f3n 6.5<\/span><\/a><span style=\"font-weight: 400;\"> a principios de a\u00f1o con un importante n\u00famero de funciones en N1QL, tanto para el servicio de consulta como para el servicio de an\u00e1lisis. Entremos en materia.<\/span><\/p>\n<div dir=\"ltr\" align=\"left\">\n<div class=\"responsive-table\">\n<table border=\"1\" width=\"100%\" cellpadding=\"10\" cellspacing=\"0\">\n<tr>\n<th><\/th>\n<th align=\"left\">MongoDB 4.4<\/th>\n<th align=\"left\">Couchbase 6.5<\/th>\n<\/tr>\n<tr>\n<td>Publicado en<\/td>\n<td>GA: julio de 2020<\/td>\n<td>GA: enero de 2020<\/td>\n<\/tr>\n<tr>\n<td>\u00bfQu\u00e9 hay de nuevo?<\/td>\n<td>\n      https:\/\/www.mongodb.com\/collateral\/mongodb-4.4-guide\n    <\/td>\n<td>\n      https:\/\/docs.couchbase.com\/server\/current\/introduction\/whats-new.html\n    <\/td>\n<\/tr>\n<tr>\n<td>Operaci\u00f3n UNION set<\/td>\n<td style=\"word-break:break-word; overflow-wrap:anywhere;\">\n      Introduces $UnionWith aggregation pipeline stage to bend data into a single<br \/>\n      result set. Roughly equivalent to UNION ALL set operation in SQL.<br \/>\n      https:\/\/docs.mongodb.com\/master\/reference\/operator\/aggregation\/unionWith\/#pipe._S_unionWith\n    <\/td>\n<td>\n      Supports all SQL set operations since the initial release: UNION, UNION ALL,<br \/>\n      EXCEPT, EXCEPT ALL, INTERSECT, INTERSECT ALL. The ALL modifier returns duplicate<br \/>\n      documents. Using the operation without ALL avoids the sort stage required in<br \/>\n      the MQL aggregation pipeline. These set operations can be used anywhere a<br \/>\n      SELECT query is used (subqueries, derived tables, etc).<br \/>\n      https:\/\/docs.couchbase.com\/server\/current\/n1ql\/n1ql-language-reference\/union.html<br \/>\n      https:\/\/blog.jooq.org\/2015\/10\/06\/you-probably-dont-use-sql-intersect-or-except-often-enough\/\n    <\/td>\n<\/tr>\n<tr>\n<td>Expresiones de agregaci\u00f3n personalizadas<\/td>\n<td>\n      Introduces $function, allowing JavaScript snippets inside the aggregation<br \/>\n      pipeline to customize processing. User-defined aggregations can be created<br \/>\n      using $accumulate, $function, $merge, and $group. This approach is verbose<br \/>\n      and must be rewritten for every query. In SQL, once a user-defined aggregate<br \/>\n      is created, it can be reused like any other aggregate.<br \/>\n      Other improvements include simple scalar functions.<br \/>\n      https:\/\/docs.mongodb.com\/master\/release-notes\/4.4\/#custom-aggregation-expressions\n    <\/td>\n<td>\n      Preview release of SQL functions and JavaScript functions usable anywhere<br \/>\n      expressions are allowed in N1QL. These can be part of complex queries and are<br \/>\n      expected to be GA in the next major release.<br \/>\n      MongoDB still lacks window functions, which were released in Couchbase 6.5<br \/>\n      and significantly improve developer productivity.<br \/>\n      Couchbase supports JavaScript-based aggregation via map-reduce views, though<br \/>\n      they are not accessible through N1QL.<br \/>\n      Couchbase Eventing functions are also written in JavaScript and provide a<br \/>\n      scalable infrastructure for modern applications.\n    <\/td>\n<\/tr>\n<tr>\n<td>Buscar en<\/td>\n<td>\n      Introduces full-text $search based on Lucene, available only in MongoDB Atlas.<br \/>\n      MongoDB itself has limited search functionality and is not Lucene-based.<br \/>\n      $search can only be used as the first stage of an aggregation pipeline and<br \/>\n      cannot be used in updates or deletes.\n    <\/td>\n<td>\n      Couchbase 6.5 introduced the SEARCH() function and related metadata functions.<br \/>\n      It supports simple string search to full-text search with deep integration<br \/>\n      into the N1QL optimizer.\n    <\/td>\n<\/tr>\n<tr>\n<td>Transacciones<\/td>\n<td>\n      Introduces the ability to create collections and indexes within a<br \/>\n      non-sharded transaction. Using DDLs inside transactions is still rare.\n    <\/td>\n<td>\n      Released distributed transactions for Java SDKs, allowing applications<br \/>\n      to operate on multiple documents using get\/set APIs. Distributed<br \/>\n      transactions are not supported for N1QL statements.\n    <\/td>\n<\/tr>\n<\/table>\n<\/div>\n<\/div>\n<p><strong>Recursos:<\/strong><\/p>\n<ol>\n<li><a href=\"https:\/\/docs.couchbase.com\">Documentaci\u00f3n de Couchbase<\/a><\/li>\n<li><a href=\"https:\/\/query-tutorial.couchbase.com\/tutorial\/#1\">Tutorial N1QL<\/a><\/li>\n<li><a href=\"https:\/\/docs.mongodb.com\/\">Documentaci\u00f3n sobre MongoDB<\/a><\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"<p>This is a short note reviewing the MongoDB MQL language features highlighted in the release blog: MongoDB 4.4: User-Driven Engineering. Ready for You.\u00a0 MongoDB 4.4 release has added a number of features for the MQL language. Couchbase released 6.5 earlier [&hellip;]<\/p>","protected":false},"author":55,"featured_media":9021,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1816,1812],"tags":[1261,1309,1725],"ppma_author":[8929],"class_list":["post-9018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-couchbase-server","category-n1ql-query","tag-json","tag-mongodb","tag-nosql-database"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.5 (Yoast SEO v26.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Comparing MongoDB MQL with N1QL features in Couchbase 6.5 - The Couchbase Blog<\/title>\n<meta name=\"description\" content=\"MongoDB 4.4 added a number of features for the MQL language. 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