{"id":6707,"date":"2015-07-15T10:00:00","date_gmt":"2015-07-15T16:00:00","guid":{"rendered":"https:\/\/memberpress.com\/?p=6707"},"modified":"2017-09-20T12:37:32","modified_gmt":"2017-09-20T18:37:32","slug":"real-men-and-women-use-sql","status":"publish","type":"post","link":"https:\/\/memberpress.com\/fr\/blog\/real-men-and-women-use-sql\/","title":{"rendered":"Les vrais hommes et femmes utilisent SQL"},"content":{"rendered":"<p>Croyez-le ou non, le titre est tout \u00e0 fait litt\u00e9ral. Des hommes et des femmes r\u00e9els utilisent en effet SQL. M\u00eame si vous n'en \u00eates pas conscient, SQL joue un r\u00f4le dans votre vie. Il se cache discr\u00e8tement dans les coulisses, fournissant les informations dont vous avez besoin pour passer la journ\u00e9e.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6ab90d293fbc9\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">CE QU'IL Y A \u00c0 L'INT\u00c9RIEUR<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6ab90d293fbc9\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/memberpress.com\/fr\/blog\/real-men-and-women-use-sql\/#W3school\" >W3school<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/memberpress.com\/fr\/blog\/real-men-and-women-use-sql\/#Udemy\" >Udemy<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Il est regrettable que SQL soit si peu reconnu pour tout le travail qu'il accomplit. Mais aujourd'hui, nous allons changer cela. C'est aujourd'hui que SQL commence \u00e0 recevoir le cr\u00e9dit qu'il m\u00e9rite.<\/p>\n<p>Dans cet article, nous allons vous pr\u00e9senter un bref historique (vraiment bref, c\u2019est promis) du langage SQL, puis nous aborderons directement ses utilisations et ses domaines d\u2019application. Si cela \u00e9veille votre curiosit\u00e9, je terminerai en vous proposant quelques ressources qui vous permettront d\u2019approfondir vos connaissances.<\/p>\n<h4>Une br\u00e8ve histoire de SQL<\/h4>\n<p>Selon votre interlocuteur, vous entendrez peut-\u00eatre parler du SQL (Structured Query Language) soit par son acronyme, soit sous le nom de \u201c sequel \u201d. Cr\u00e9\u00e9 \u00e0 l\u2019origine par IBM, le SQL a vu le jour dans les ann\u00e9es 1970 pour r\u00e9pondre \u00e0 un probl\u00e8me. IBM devait trouver un moyen de communiquer avec les bases de donn\u00e9es et d'exploiter les informations qu'elles contenaient.<\/p>\n<p>Depuis les ann\u00e9es 1970, SQL est devenu le langage standard mondial utilis\u00e9 pour communiquer avec les bases de donn\u00e9es relationnelles. Avant l'av\u00e8nement des bases de donn\u00e9es relationnelles, nous nous appuyions principalement sur un mod\u00e8le plus complexe appel\u00e9 <a href=\"https:\/\/en.wikipedia.org\/wiki\/Hierarchical_database_model\" target=\"_blank\" rel=\"noopener\">hi\u00e9rarchique<\/a>. J'ai mis un lien vers ce terme, car si nous passons encore trop de temps sur ce sujet, je n'aurai pas tenu ma promesse.<\/p>\n<p>Passons maintenant \u00e0 quelques d\u00e9tails plus utiles.<\/p>\n<h4>Qu'est-ce qu'une base de donn\u00e9es ?<\/h4>\n<p>La d\u00e9finition la plus simple que l'on puisse donner est qu'une base de donn\u00e9es est un ensemble organis\u00e9 de donn\u00e9es. Imaginez que vous preniez le nom, l'adresse, le num\u00e9ro de t\u00e9l\u00e9phone et le code postal de chaque habitant de votre ville et que vous les d\u00e9posiez dans un grand seau. Mais nous allons pr\u00e9ciser davantage ce processus. Notez les informations relatives \u00e0 chaque personne sur une feuille de papier avant de les d\u00e9poser dans votre seau. Bravo, vous disposez d\u00e9sormais d\u2019un seau contenant des milliers d\u2019informations.<\/p>\n<p>Maintenant, secouez votre seau, en vous assurant que vos morceaux de papier sont bien m\u00e9lang\u00e9s. Ce seau est essentiellement votre base de donn\u00e9es et il n'est pas diff\u00e9rent de la base de donn\u00e9es typique contenue dans votre ordinateur ou votre smartphone.<\/p>\n<p>Vous voyez o\u00f9 on veut en venir, n'est-ce pas ? Vous venez de vous cr\u00e9er un petit probl\u00e8me. Vous disposez d'un \u00ab seau \u00bb (une base de donn\u00e9es) rempli d'informations utiles, mais comment extraire ces informations de ce \u00ab seau \u00bb de mani\u00e8re efficace pour pouvoir les exploiter ?<\/p>\n<h4>Quel est le lien entre SQL et votre base de donn\u00e9es ?<\/h4>\n<p>Pour en rester \u00e0 notre seau de noms et d'adresses, imaginons maintenant que vous ayez un annuaire t\u00e9l\u00e9phonique vide connect\u00e9 \u00e0 votre seau. Comment obtenir les informations de votre seau - qui est essentiellement un fouillis - dans votre annuaire t\u00e9l\u00e9phonique d'une mani\u00e8re utilisable et lisible ? SQL \u00e0 la rescousse.<\/p>\n<p>SQL est le langage capable de communiquer avec votre base de donn\u00e9es. Pour ce faire, il g\u00e9n\u00e8re ce que l'on appelle une \"requ\u00eate\". Par exemple, afficher les r\u00e9sultats pour chaque personne de ma base de donn\u00e9es qui :<\/p>\n<ul>\n<li>A un nom de famille qui commence par la lettre A<\/li>\n<li>A le code postal 785241<\/li>\n<\/ul>\n<p>D'un seul coup, vous pouvez d\u00e9sormais extraire des informations utiles de votre base de donn\u00e9es. Vous pouvez en effet cr\u00e9er pratiquement n'importe quel type de requ\u00eate, et SQL vous renverra les informations correspondantes dans votre r\u00e9pertoire t\u00e9l\u00e9phonique pour que vous puissiez les consulter.<\/p>\n<p>Au fil du temps, votre base de donn\u00e9es s'\u00e9toffera et contiendra davantage de noms, voire des informations suppl\u00e9mentaires, telles que le revenu du m\u00e9nage. Vous pouvez continuer \u00e0 utiliser SQL pour communiquer et extraire les informations dont vous avez besoin. SQL placera m\u00eame les informations dans le seau pour vous.<\/p>\n<h4>Un exemple concret<\/h4>\n<p>La plupart d'entre nous ne se retrouveront jamais dans une situation o\u00f9 ils devront cr\u00e9er directement des requ\u00eates SQL. Mais cela ne signifie pas pour autant que vous n'utilisez pas de base de donn\u00e9es ou de SQL. Heureusement, il existe des programmes ou des applications qui se chargent de tout le travail \u00e0 notre place.<\/p>\n<p>Le gestionnaire de contacts que vous avez sur votre ordinateur est l'une de ces applications. Pour vous faciliter la vie, l'application poss\u00e8de ce que l'on appelle une interface utilisateur graphique (IUG). Lorsque vous regardez votre \u00e9cran, c'est cette interface graphique que vous voyez. Si vous cliquez sur la lettre \"V\", votre application enverra une requ\u00eate via SQL \u00e0 votre base de donn\u00e9es en disant \"Je demande toutes les entr\u00e9es dont le nom de famille commence par la lettre V\".<\/p>\n<p>Comme par magie, votre gestionnaire de contacts affiche d\u00e9sormais une liste de toutes les personnes de votre base de donn\u00e9es portant le nom de famille en question. Il s'agit \u00e9videmment d'une version simplifi\u00e9e, mais je pense qu'elle rend le processus un peu plus facile \u00e0 comprendre.<\/p>\n<p>Il existe essentiellement quatre actions que votre interface graphique peut vous permettre d'effectuer sur votre base de donn\u00e9es. Ces actions sont les suivantes :<\/p>\n<ol>\n<li><strong>Modifier<\/strong> une entr\u00e9e de base de donn\u00e9es existante - l'adresse de vos amis a chang\u00e9.<\/li>\n<li><strong>Ins\u00e9rer<\/strong> une nouvelle entr\u00e9e dans la base de donn\u00e9es - vous vous \u00eates fait un nouvel ami.<\/li>\n<li><strong>Retirer<\/strong> une entr\u00e9e de la base de donn\u00e9es : vous avez supprim\u00e9 quelqu\u2019un de votre liste d\u2019amis.<\/li>\n<li><strong>Demande<\/strong> des informations issues de la base de donn\u00e9es : vous cherchez le num\u00e9ro de t\u00e9l\u00e9phone d'un ami en particulier.<\/li>\n<\/ol>\n<p>Bien que vos interactions soient limit\u00e9es \u00e0 ces quatre cat\u00e9gories, vous disposez d'une puissance \u00e9tonnante pour manipuler les donn\u00e9es.<\/p>\n<h4>O\u00f9 en savoir plus ?<\/h4>\n<p>Bien que le langage SQL et la gestion des bases de donn\u00e9es semblent \u00eatre des sujets arides, ils sont essentiels \u00e0 notre vie quotidienne. Sans SQL, notre soci\u00e9t\u00e9 pourrait probablement revenir au moins 40 ans en arri\u00e8re. C'est exact, nous reviendrions \u00e0 l'\u00e9poque des <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rolodex\" target=\"_blank\" rel=\"noopener\">Rolodex<\/a>.<\/p>\n<p>Si cet article a \u00e9veill\u00e9 votre int\u00e9r\u00eat pour SQL, il existe d'excellentes ressources pour vous aider \u00e0 en apprendre davantage.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"W3school\"><\/span><a href=\"http:\/\/www.w3schools.com\/sql\/default.asp\" target=\"_blank\" rel=\"noopener\">W3school<\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-6986\" src=\"https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools.png\" alt=\"W3Schools\" width=\"740\" height=\"239\" srcset=\"https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools.png 740w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools-300x97.png 300w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools-526x170.png 526w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools-700x226.png 700w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/W3Schools-156x50.png 156w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><\/p>\n<p>La plupart d'entre nous se sont r\u00e9f\u00e9r\u00e9s \u00e0 W3school pour obtenir de l'aide en mati\u00e8re de CSS et de HTML. Il se trouve qu'ils disposent \u00e9galement d'une excellente ressource pour apprendre le langage SQL. Cela dit, ce n'est peut-\u00eatre pas la meilleure ressource pour les d\u00e9butants. Elle est assez directe et ne contient pas d'exemples adapt\u00e9s aux profanes. Si vous \u00eates quelqu'un qui apprend visuellement et auditivement, notre prochaine source sera peut-\u00eatre mieux adapt\u00e9e.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Udemy\"><\/span><a href=\"https:\/\/www.udemy.com\/courses\/search\/?q=sql\" target=\"_blank\" rel=\"noopener\">Udemy<\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-6989\" src=\"https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy.png\" alt=\"Udemy\" width=\"740\" height=\"325\" srcset=\"https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy.png 740w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy-300x132.png 300w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy-387x170.png 387w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy-700x307.png 700w, https:\/\/memberpress.com\/wp-content\/uploads\/2015\/07\/Udemy-156x69.png 156w\" sizes=\"(max-width: 740px) 100vw, 740px\" \/><\/p>\n<p>Udemy propose d'excellents cours qui peuvent vous aider \u00e0 approfondir vos connaissances en SQL. Plusieurs cours gratuits sont disponibles, mais les cours de meilleure qualit\u00e9 sont payants (\u00e0 un prix modique). Si vous souhaitez vraiment acqu\u00e9rir des comp\u00e9tences de base en SQL, c'est sans doute l\u00e0 que vous devriez vous rendre.<\/p>\n<h4>Conclusion<\/h4>\n<p>Nous esp\u00e9rons que ce billet vous a donn\u00e9 une introduction tr\u00e8s basique \u00e0 ce qu'est exactement SQL et \u00e0 quel point il est important dans nos vies. Si vous vous arr\u00eatez quelques secondes pour y r\u00e9fl\u00e9chir, vous r\u00e9aliserez \u00e0 quel point nous d\u00e9pendons des donn\u00e9es chaque jour.<\/p>\n<p>Apprendre \u00e0 utiliser et \u00e0 exploiter ces donn\u00e9es est une comp\u00e9tence extr\u00eamement pr\u00e9cieuse ; si nous avons \u00e9veill\u00e9 votre int\u00e9r\u00eat, prenez le temps d'en savoir plus.<\/p>\n<p><strong>Si vous avez d\u00e9j\u00e0 utilis\u00e9 une interface comme <a href=\"https:\/\/www.mysql.com\/\" target=\"_blank\" rel=\"noopener\">MySQL<\/a>Si vous n'\u00eates pas d'accord avec la proposition de la Commission, faites-nous part de vos exp\u00e9riences dans les commentaires.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>Believe it or not, the headline is quite literal. Real men and women do in fact use SQL. Even if you\u2019re not aware of it, SQL plays a role in your life. Quietly hiding behind the scenes, delivering the information that you need to get through the\u00a0day. It\u2019s unfortunate that SQL gets so little credit [&hellip;]<\/p>\n","protected":false},"author":2122,"featured_media":15176,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"om_disable_all_campaigns":false,"_strive_editorial_status":"not-started","_strive_copy_of":0,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"content-sidebar","_FSMCFIC_featured_image_caption":"","_FSMCFIC_featured_image_nocaption":"","_FSMCFIC_featured_image_hide":"","_strive_checklists":"\"\"","_strive_active_checklist":"62291e2bb2422","_strive_post_notes":"","footnotes":""},"categories":[120],"tags":[265,264],"class_list":["post-6707","post","type-post","status-publish","format-standard","has-post-thumbnail","category-content","tag-learning-resources","tag-sql","entry"],"acf":{"plans":["scale"],"is_featured":false,"download_source":"none","mothership_slug":"","download_url":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Learn how important SQL is to our daily lives. 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