{"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\/es\/blog\/real-men-and-women-use-sql\/","title":{"rendered":"Los hombres y mujeres de verdad usan SQL"},"content":{"rendered":"<p>Lo crea o no, el titular es bastante literal. Los hombres y mujeres de verdad utilizan SQL. Aunque no seas consciente de ello, SQL desempe\u00f1a un papel en tu vida. Se esconde silenciosamente entre bastidores y le proporciona la informaci\u00f3n que necesita para pasar el d\u00eda.<\/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-6ab90d1a6246f\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">QU\u00c9 HAY DENTRO<\/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-6ab90d1a6246f\"  \/><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\/es\/blog\/real-men-and-women-use-sql\/#W3school\" >Escuela W3<\/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\/es\/blog\/real-men-and-women-use-sql\/#Udemy\" >Udemy<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>Es una pena que SQL reciba tan poco cr\u00e9dito por todo el trabajo que hace. Pero hoy vamos a cambiar eso. Hoy es el d\u00eda en que SQL empieza a recibir el cr\u00e9dito que se merece.<\/p>\n<p>En este art\u00edculo, te vamos a ofrecer una breve historia (muy breve, te lo prometo) de SQL y, a continuaci\u00f3n, pasaremos directamente a explicar c\u00f3mo y d\u00f3nde se utiliza SQL. Por si te despierto el inter\u00e9s, terminar\u00e9 recomend\u00e1ndote algunos recursos donde podr\u00e1s empezar a aprender m\u00e1s.<\/p>\n<h4>Breve historia de SQL<\/h4>\n<p>Dependiendo de con qui\u00e9n hables, es posible que oigas referirse al SQL (Structured Query Language) por sus siglas o, tal vez, como \u201csequel\u201d. El SQL, que en un principio fue un producto de IBM, surgi\u00f3 en la d\u00e9cada de los 70 como respuesta a un problema. IBM necesitaba encontrar una forma de comunicarse con la informaci\u00f3n contenida en las bases de datos y de manipularla.<\/p>\n<p>Desde los a\u00f1os 70, SQL se ha convertido en el lenguaje est\u00e1ndar utilizado en todo el mundo para comunicarse con las bases de datos relacionales. Antes de la llegada de las bases de datos relacionales, nos bas\u00e1bamos principalmente en un modelo m\u00e1s complejo llamado <a href=\"https:\/\/en.wikipedia.org\/wiki\/Hierarchical_database_model\" target=\"_blank\" rel=\"noopener\">jer\u00e1rquico<\/a>. He incluido un enlace a ese t\u00e9rmino porque, si dedicamos mucho m\u00e1s tiempo a este tema, habr\u00e9 incumplido mi promesa.<\/p>\n<p>Pasemos ahora a algunos detalles m\u00e1s \u00fatiles.<\/p>\n<h4>\u00bfQu\u00e9 es una base de datos?<\/h4>\n<p>La definici\u00f3n m\u00e1s sencilla que se nos ocurre es que una base de datos es una recopilaci\u00f3n organizada de datos. Imagina que coges el nombre, la direcci\u00f3n, el n\u00famero de tel\u00e9fono y el c\u00f3digo postal de todas las personas que viven en tu ciudad y los metes en un cubo grande. Pero vamos a ser m\u00e1s espec\u00edficos con este proceso. Anota la informaci\u00f3n de cada persona en una hoja de papel antes de meterla en el cubo. \u00a1Bien hecho! Ahora tienes un cubo que contiene miles de datos.<\/p>\n<p>Ahora, agita el cubo y aseg\u00farate de que los trozos de papel est\u00e9n bien mezclados. Ese cubo es esencialmente tu base de datos y no es muy diferente de la t\u00edpica base de datos contenida en tu ordenador o smartphone.<\/p>\n<p>Ya te imaginas por d\u00f3nde vamos, \u00bfverdad? Ahora te has metido en un peque\u00f1o l\u00edo. Tienes un cubo (una base de datos) lleno de informaci\u00f3n \u00fatil, pero \u00bfc\u00f3mo sacas esa informaci\u00f3n del cubo de forma eficiente para que sea utilizable?<\/p>\n<h4>\u00bfC\u00f3mo se relaciona SQL con su base de datos?<\/h4>\n<p>Siguiendo con nuestro cubo de nombres y direcciones, imaginemos ahora que tienes una gu\u00eda telef\u00f3nica vac\u00eda conectada a tu cubo. \u00bfC\u00f3mo introducir la informaci\u00f3n de tu cubo -que es esencialmente un revoltijo- en tu agenda telef\u00f3nica de forma legible y utilizable? SQL al rescate.<\/p>\n<p>SQL es el lenguaje capaz de comunicarse con su base de datos. Lo hace generando lo que se denomina una \"consulta\". Por ejemplo, mostrar los resultados para cada persona en mi base de datos que:<\/p>\n<ul>\n<li>Tiene un apellido que empieza por la letra A<\/li>\n<li>Tiene el c\u00f3digo postal 785241<\/li>\n<\/ul>\n<p>De repente, ya puedes empezar a extraer informaci\u00f3n \u00fatil de tu base de datos. B\u00e1sicamente, puedes crear cualquier tipo de consulta que desees y SQL te mostrar\u00e1 la informaci\u00f3n correspondiente en tu agenda para que puedas verla.<\/p>\n<p>Con el tiempo, su base de datos crecer\u00e1 y contendr\u00e1 m\u00e1s nombres o incluso informaci\u00f3n adicional, como los ingresos familiares. Puedes seguir utilizando SQL para comunicar y extraer la informaci\u00f3n que necesites. SQL incluso pondr\u00e1 la informaci\u00f3n en el cubo por ti.<\/p>\n<h4>Un ejemplo real<\/h4>\n<p>La mayor\u00eda de nosotros nunca nos veremos en la situaci\u00f3n de tener que crear consultas SQL directamente. Pero eso no significa que no utilices una base de datos o SQL. Por suerte, contamos con programas o aplicaciones que se encargan de todo el trabajo pesado por nosotros.<\/p>\n<p>El gestor de contactos que tienes en tu ordenador es una de esas aplicaciones. Para hacerte la vida m\u00e1s f\u00e1cil, la aplicaci\u00f3n tiene lo que se llama una interfaz gr\u00e1fica de usuario (GUI, por sus siglas en ingl\u00e9s). Cuando miras a tu pantalla, lo que ves es esta GUI. Si hiciera clic en la letra \"V\", la aplicaci\u00f3n enviar\u00eda una petici\u00f3n SQL a la base de datos diciendo: \"Solicito todas las entradas cuyo apellido empiece por la letra V\".<\/p>\n<p>M\u00e1gicamente, tu gestor de contactos muestra ahora una lista de todas las personas de tu base de datos con el apellido correspondiente. Obviamente, esta es una versi\u00f3n simplificada, pero creo que facilita un poco la comprensi\u00f3n del proceso.<\/p>\n<p>Existen esencialmente cuatro acciones que su GUI puede permitirle realizar en su base de datos. \u00c9stas son:<\/p>\n<ol>\n<li><strong>Modifique<\/strong> una entrada existente en la base de datos: la direcci\u00f3n de tus amigos ha cambiado.<\/li>\n<li><strong>Inserte<\/strong> una nueva entrada en la base de datos: has hecho un nuevo amigo.<\/li>\n<li><strong>Eliminar<\/strong> una entrada de la base de datos: has dejado de ser amigo de alguien.<\/li>\n<li><strong>Solicitar<\/strong> informaci\u00f3n de la base de datos: est\u00e1s intentando encontrar el n\u00famero de tel\u00e9fono de un amigo concreto.<\/li>\n<\/ol>\n<p>Aunque tus interacciones se limitan a estas cuatro categor\u00edas, sigues teniendo un poder asombroso a tu alcance a la hora de manipular los datos.<\/p>\n<h4>\u00bfD\u00f3nde puede obtener m\u00e1s informaci\u00f3n?<\/h4>\n<p>Aunque SQL y la gesti\u00f3n de bases de datos parecen un tema \u00e1rido, son esenciales para nuestra vida cotidiana. Sin SQL, como sociedad probablemente podr\u00edamos retroceder el reloj al menos 40 a\u00f1os. As\u00ed es, volver\u00edamos a los d\u00edas de un <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rolodex\" target=\"_blank\" rel=\"noopener\">Rolodex<\/a>.<\/p>\n<p>Si este art\u00edculo le ha despertado el inter\u00e9s por SQL, existen excelentes recursos que le ayudar\u00e1n a aprender m\u00e1s.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"W3school\"><\/span><a href=\"http:\/\/www.w3schools.com\/sql\/default.asp\" target=\"_blank\" rel=\"noopener\">Escuela W3<\/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 mayor\u00eda de nosotros nos hemos referido a W3school para obtener ayuda con CSS y HTML. Resulta que tambi\u00e9n tienen un gran recurso disponible para aprender SQL. Dicho esto, puede que no sea el mejor recurso para principiantes. Es bastante directo y no tiene ejemplos adecuados para los profanos. Si eres una persona que aprende de forma visual y auditiva, nuestra siguiente fuente puede ser m\u00e1s adecuada.<\/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 ofrece unos cursos estupendos que pueden ayudarte a aprender m\u00e1s sobre SQL. Hay varios cursos gratuitos disponibles, pero los de mayor calidad conllevan una peque\u00f1a cuota. Si de verdad quieres adquirir conocimientos b\u00e1sicos de SQL, probablemente este sea el lugar ideal para ti.<\/p>\n<h4>Conclusi\u00f3n<\/h4>\n<p>Esperamos que este art\u00edculo te haya proporcionado una introducci\u00f3n muy b\u00e1sica sobre qu\u00e9 es exactamente SQL y lo importante que es para nuestras vidas. Si te paras a pensarlo unos segundos, te dar\u00e1s cuenta de lo mucho que dependemos de los datos cada d\u00eda.<\/p>\n<p>Aprender a utilizar y manejar esos datos es una habilidad incre\u00edblemente valiosa, as\u00ed que, si hemos despertado tu inter\u00e9s, t\u00f3mate tu tiempo para informarte mejor.<\/p>\n<p><strong>Si alguna vez has utilizado una interfaz como <a href=\"https:\/\/www.mysql.com\/\" target=\"_blank\" rel=\"noopener\">MySQL<\/a>Comparta sus experiencias en los comentarios.<\/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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