{"id":172511,"date":"2023-10-30T17:45:52","date_gmt":"2023-10-30T16:45:52","guid":{"rendered":"https:\/\/datascientest.com\/en\/?p=172511"},"modified":"2023-10-30T17:52:23","modified_gmt":"2023-10-30T16:52:23","slug":"olap-everything-you-need-to-know-about-this-database-organization","status":"publish","type":"post","link":"https:\/\/datascientest.com\/en\/olap-everything-you-need-to-know-about-this-database-organization","title":{"rendered":"OLAP: everything you need to know about this database organization"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"172511\" class=\"elementor elementor-172511\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-473dd8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"473dd8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-3fc4add1\" data-id=\"3fc4add1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5bc36d02 elementor-widget elementor-widget-text-editor\" data-id=\"5bc36d02\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<h2><strong>This article deals with a form of database organization known as OLAP. Before you start reading it, and to make sure you fully grasp its contents, you may be interested to read our article on databases. This article will explain how databases work, their architecture and the different programming languages that govern them.<\/strong><\/h2>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15c92680 elementor-widget elementor-widget-text-editor\" data-id=\"15c92680\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><span style=\"font-weight: 400; color: #000000;\">Databases are becoming increasingly ubiquitous. However, behind this term lie different categories that do not follow the same organizational rules. <a href=\"https:\/\/datascientest.com\/en\/all-about-non-relational-databases\">Whether it&#8217;s a relational database<\/a> or an OLAP <a href=\"https:\/\/datascientest.com\/en\/database-what-is-it\">database<\/a>, there are many differences. In this article, you&#8217;ll find out everything there is to know about OLAP, a powerful analysis technology.<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1146611a elementor-widget elementor-widget-heading\" data-id=\"1146611a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h3 class=\"elementor-heading-title elementor-size-default\">What is OLAP ?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-48403bc8 elementor-widget elementor-widget-text-editor\" data-id=\"48403bc8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>OLAP; for online analytical processing is a technology for organizing large commercial databases that supports multidimensional analysis.<\/p><p>It can be used to perform complex analytical queries without adversely affecting transactional systems. For example, it is possible to quickly obtain the number of sales and then add other dimensions such as dates, geographical regions or other characteristics of the sale, which would previously have taken a <strong>considerable amount of time.<\/strong><\/p><p>This form of data pre-sorting greatly reduces the time <a href=\"https:\/\/datascientest.com\/en\/database-what-is-it\">between database query<\/a> and completion. To better understand what OLAP technology is, and more specifically where the need for such a tool came from, you can watch the following video:<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7d81ce8d elementor-widget elementor-widget-video\" data-id=\"7d81ce8d\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=2ryG3Jy6eIY&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-video .elementor-widget-container{overflow:hidden;transform:translateZ(0)}.elementor-widget-video .elementor-wrapper{aspect-ratio:var(--video-aspect-ratio)}.elementor-widget-video .elementor-wrapper iframe,.elementor-widget-video .elementor-wrapper video{height:100%;width:100%;display:flex;border:none;background-color:#000}@supports not (aspect-ratio:1\/1){.elementor-widget-video .elementor-wrapper{position:relative;overflow:hidden;height:0;padding-bottom:calc(100% \/ var(--video-aspect-ratio))}.elementor-widget-video .elementor-wrapper iframe,.elementor-widget-video .elementor-wrapper video{position:absolute;top:0;right:0;bottom:0;left:0}}.elementor-widget-video .elementor-open-inline .elementor-custom-embed-image-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background-size:cover;background-position:50%}.elementor-widget-video .elementor-custom-embed-image-overlay{cursor:pointer;text-align:center}.elementor-widget-video .elementor-custom-embed-image-overlay:hover .elementor-custom-embed-play i{opacity:1}.elementor-widget-video .elementor-custom-embed-image-overlay img{display:block;width:100%;aspect-ratio:var(--video-aspect-ratio);-o-object-fit:cover;object-fit:cover;-o-object-position:center center;object-position:center center}@supports not (aspect-ratio:1\/1){.elementor-widget-video .elementor-custom-embed-image-overlay{position:relative;overflow:hidden;height:0;padding-bottom:calc(100% \/ var(--video-aspect-ratio))}.elementor-widget-video .elementor-custom-embed-image-overlay img{position:absolute;top:0;right:0;bottom:0;left:0}}.elementor-widget-video .e-hosted-video .elementor-video{-o-object-fit:cover;object-fit:cover}.e-con-inner>.elementor-widget-video,.e-con>.elementor-widget-video{width:var(--container-widget-width);--flex-grow:var(--container-widget-flex-grow)}<\/style>\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-315bca5a elementor-widget elementor-widget-heading\" data-id=\"315bca5a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How does OLAP work?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ec719d2 elementor-widget elementor-widget-text-editor\" data-id=\"1ec719d2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The first step in <strong>OLAP&#8217;s operation<\/strong> is the collection of data from one or more sources, which is then stored in data warehouses.<\/p><p>Subsequently, OLAP assembles and <a href=\"https:\/\/datascientest.com\/en\/acid-in-database-management\">organizes databases<\/a> in the form of OLAP cubes, in order to increase the speed of analysis. A cube contains data that is sorted into so-called dimensional tables, the dimensions of which are then filled in by users.<\/p><p>From one or more two-dimensional tables to a multi-dimensional organization<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1841d309 elementor-widget elementor-widget-heading\" data-id=\"1841d309\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What's the difference with OLTP?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f0b3f80 elementor-widget elementor-widget-image\" data-id=\"4f0b3f80\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.15.0 - 02-08-2023 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"512\" height=\"480\" src=\"https:\/\/datascientest.com\/en\/files\/2023\/10\/unnamed-3.png\" class=\"attachment-medium_large size-medium_large wp-image-172515\" alt=\"\" srcset=\"https:\/\/datascientest.com\/en\/files\/2023\/10\/unnamed-3.png 512w, https:\/\/datascientest.com\/en\/files\/2023\/10\/unnamed-3-300x281.png 300w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f142cf3 elementor-widget elementor-widget-text-editor\" data-id=\"6f142cf3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>OLTP and OLAP (online transaction processes) don&#8217;t carry out queries in the same way. An OLTP query only concerns a small number of records.<\/p><p>A common example of an OLTP query is a <strong>bank transfer<\/strong> from one account to another. In such an example, only the sender and receiver accounts are modified. In contrast, an OLAP query tends to mobilize a large amount of data to produce an analysis. To take the example of a company&#8217;s sales over 10 months, for 8 products and 6 locations, 480 data items are mobilized, so this number increases rapidly.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78486d6b elementor-widget elementor-widget-heading\" data-id=\"78486d6b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What are the advantages of OLAP?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18482774 elementor-widget elementor-widget-text-editor\" data-id=\"18482774\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>OLAP enables users to gain various insights into a set of data. These include dashboards, reporting and analysis. The best-known analysis techniques enabled by OLAP are as follows:<\/p><ul><li><strong>Roll-up:<\/strong> this operation consists in gathering data around a cube. This is done either by removing certain dimensions from a cube, or by gathering data together.<\/li><li><strong>Drill-down:<\/strong> this involves refining the analysis within the data system. For example, if the user wishes to refine his geographical search, he will switch from the &#8220;continent&#8221; dimension to the &#8220;country&#8221; dimension.<\/li><li><strong>Slice:<\/strong> this operation consists in building a new sub-dimension from a particular dimension of another cube.<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35a94708 elementor-widget elementor-widget-heading\" data-id=\"35a94708\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What are the practical uses of OLAP?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e93fbbb elementor-widget elementor-widget-text-editor\" data-id=\"e93fbbb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>OLAP<\/strong> is commonly used for <a href=\"https:\/\/datascientest.com\/en\/data-analysis-course-face-to-face-or-online-whats-the-best-choice\">many data analysis tasks<\/a>, such as data mining. In other words, this tool makes it possible to explore and analyze certain databases in order to extract trends from the relationships established between the data. This is made possible by the multidimensional data of OLAP systems.<\/p><p>As a result, OLAP is at the heart of many data warehouse tools. It enables data from multiple sources to be brought together for analysis and comparison, which is exactly what data warehousing is all about. OLAP enables data to be converted into usable information.<\/p><p>Thanks to its multiple uses in converting data into useful information and insights, this technology is one of the <a href=\"https:\/\/datascientest.com\/en\/mastering-microstrategy-unveiling-the-power-of-business-intelligence\">keys to the emergence of business intelligence.<\/a> OLAP is at the heart of BI software, as it enables analyses to be carried out based on the company&#8217;s acquired and prospective data. For example, one of our partners at DataScientest Microstrategy uses ROLAP, which is a variation of OLAP technology.<\/p><p>The great advantage of an OLAP-configured database is that it enables comparisons to be made between different data that do not necessarily come from the <a href=\"https:\/\/datascientest.com\/en\/business-analyst-course-cracking-the-code-to-business-analysis\">same databases.<\/a><\/p><p>To sum up, OLAP is particularly useful for decision-making, as this analysis method provides a wide range of reliable indicators of a company&#8217;s performance, but also enables certain forecasting tools to be put in place, notably through the identification of trends.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a8139e3 elementor-widget elementor-widget-heading\" data-id=\"1a8139e3\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How do I learn to master database management?<\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44082112 elementor-widget elementor-widget-text-editor\" data-id=\"44082112\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>If you&#8217;d like to find out more about databases, how they work and what they&#8217;re used for, and if you&#8217;re professionally interested in this sector, you can learn more by applying for our <a href=\"https:\/\/datascientest.com\/en\/cloud-data-engineer-course-the-best-options\">data engineer training course.<\/a> This course provides training in a profession whose essence is to guarantee the quality and security of data, but also to decide on the organization of data.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-516d343f elementor-align-center elementor-widget elementor-widget-button\" data-id=\"516d343f\" data-element_type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm elementor-animation-grow\" href=\"https:\/\/datascientest.com\/en\/data-engineer-course\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-text\">Data Engineer Training<\/span>\n\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-612781b e-flex e-con-boxed e-con\" data-id=\"612781b\" data-element_type=\"container\" data-settings=\"{&quot;content_width&quot;:&quot;boxed&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>This article deals with a form of database organization known as OLAP. Before you start reading it, and to make sure you fully grasp its contents, you may be interested to read our article on databases. This article will explain how databases work, their architecture and the different programming languages that govern them. Databases are [&hellip;]<\/p>\n","protected":false},"author":67,"featured_media":172513,"comment_status":"open","ping_status":"open","sticky":false,"template":"elementor_theme","format":"standard","meta":{"content-type":"","inline_featured_image":false},"categories":[2424],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.7 (Yoast SEO v21.7) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>OLAP: everything you need to know about this database organization<\/title>\n<meta name=\"description\" content=\"Dive into the realm of OLAP (Online Analytical Processing) and gain comprehensive insights into this database organization technique.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/datascientest.com\/en\/olap-everything-you-need-to-know-about-this-database-organization\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"OLAP: everything you need to know about this database organization\" \/>\n<meta property=\"og:description\" content=\"This article deals with a form of database organization known as OLAP. 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