{"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\/pt\/blog\/real-men-and-women-use-sql\/","title":{"rendered":"Homens e mulheres de verdade usam SQL"},"content":{"rendered":"<p>Acredite ou n\u00e3o, a manchete \u00e9 bem literal. Homens e mulheres de verdade de fato usam SQL. Mesmo que voc\u00ea n\u00e3o esteja ciente disso, o SQL desempenha um papel em sua vida. Silenciosamente escondido nos bastidores, fornecendo as informa\u00e7\u00f5es de que voc\u00ea precisa para passar o dia.<\/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-6ab90d196ae64\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">O QUE H\u00c1 DENTRO<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/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-6ab90d196ae64\"  \/><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\/pt\/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\/pt\/blog\/real-men-and-women-use-sql\/#Udemy\" >Udemy<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>\u00c9 lament\u00e1vel que o SQL receba t\u00e3o pouco cr\u00e9dito por todo o trabalho que realiza. Mas hoje vamos mudar isso. Hoje \u00e9 o dia em que o SQL come\u00e7ar\u00e1 a receber o cr\u00e9dito que merece.<\/p>\n<p>Neste artigo, vamos apresentar uma breve hist\u00f3ria (muito breve, prometo) do SQL e, em seguida, vamos direto ao ponto: como e onde o SQL \u00e9 usado. Caso eu tenha despertado seu interesse, vou encerrar sugerindo alguns recursos onde voc\u00ea pode come\u00e7ar a se aprofundar no assunto.<\/p>\n<h4>Uma breve hist\u00f3ria do SQL<\/h4>\n<p>Dependendo de com quem voc\u00ea estiver conversando, poder\u00e1 ouvir o SQL (Structured Query Language) ser chamado tanto pelas letras que comp\u00f5em seu nome quanto, possivelmente, como \u201csequel\u201d. Originalmente um produto da IBM, o SQL surgiu na d\u00e9cada de 1970 como resultado de um problema. A IBM precisava encontrar uma maneira de se comunicar com as informa\u00e7\u00f5es contidas em bancos de dados e de manipul\u00e1-las.<\/p>\n<p>Desde a d\u00e9cada de 1970, o SQL se tornou a linguagem padr\u00e3o mundial usada para se comunicar com bancos de dados relacionais. Antes do advento dos bancos de dados relacionais, depend\u00edamos principalmente de um modelo mais complexo chamado <a href=\"https:\/\/en.wikipedia.org\/wiki\/Hierarchical_database_model\" target=\"_blank\" rel=\"noopener\">hier\u00e1rquico<\/a>. Coloquei o link para esse termo porque, se ficarmos falando muito mais sobre esse assunto, vou acabar quebrando minha promessa.<\/p>\n<p>Vamos passar a alguns detalhes mais \u00fateis.<\/p>\n<h4>O que \u00e9 um banco de dados?<\/h4>\n<p>A defini\u00e7\u00e3o mais simples que podemos dar \u00e9 que um banco de dados \u00e9 uma cole\u00e7\u00e3o organizada de dados. Imagine pegar o nome, endere\u00e7o, n\u00famero de telefone e CEP de todas as pessoas que moram na sua cidade e coloc\u00e1-los em um balde grande. Mas vamos ser mais espec\u00edficos sobre esse processo. Anote as informa\u00e7\u00f5es de cada pessoa em uma \u00fanica folha de papel antes de coloc\u00e1-las no balde. Muito bem, agora voc\u00ea tem um balde que cont\u00e9m milhares de informa\u00e7\u00f5es.<\/p>\n<p>Agora, chacoalhe o balde, certificando-se de que os peda\u00e7os de papel estejam bem misturados. Esse balde \u00e9 essencialmente seu banco de dados e n\u00e3o \u00e9 muito diferente do banco de dados t\u00edpico contido em seu computador ou smartphone.<\/p>\n<p>D\u00e1 para perceber onde queremos chegar com isso, certo? Agora voc\u00ea criou um pequeno problema. Voc\u00ea tem um balde (banco de dados) cheio de informa\u00e7\u00f5es \u00fateis, mas como extrair essas informa\u00e7\u00f5es do balde de maneira eficiente para que possam ser utilizadas?<\/p>\n<h4>Como o SQL est\u00e1 relacionado ao seu banco de dados?<\/h4>\n<p>Continuando com o nosso balde de nomes e endere\u00e7os, vamos imaginar que voc\u00ea tenha uma lista telef\u00f4nica vazia conectada ao seu balde. Como obter as informa\u00e7\u00f5es do seu balde - que \u00e9 essencialmente uma bagun\u00e7a - para a sua agenda telef\u00f4nica de uma forma utiliz\u00e1vel e leg\u00edvel? SQL para o resgate.<\/p>\n<p>SQL \u00e9 a linguagem capaz de se comunicar com seu banco de dados. Ela faz isso gerando o que \u00e9 chamado de \"consulta\". Por exemplo, mostrar os resultados para cada pessoa em meu banco de dados que:<\/p>\n<ul>\n<li>Tem um sobrenome que come\u00e7a com a letra A<\/li>\n<li>Tem o c\u00f3digo postal 785241<\/li>\n<\/ul>\n<p>De repente, voc\u00ea j\u00e1 consegue come\u00e7ar a extrair informa\u00e7\u00f5es \u00fateis do seu banco de dados. Basicamente, voc\u00ea pode criar qualquer tipo de consulta que desejar, e o SQL retornar\u00e1 as informa\u00e7\u00f5es adequadas \u00e0 sua agenda para que voc\u00ea possa visualiz\u00e1-las.<\/p>\n<p>Com o tempo, seu banco de dados aumentar\u00e1 para conter mais nomes ou at\u00e9 mesmo informa\u00e7\u00f5es adicionais, como a renda familiar. Voc\u00ea pode continuar usando o SQL para se comunicar e extrair as informa\u00e7\u00f5es de que precisa. O SQL at\u00e9 mesmo colocar\u00e1 as informa\u00e7\u00f5es no bucket para voc\u00ea.<\/p>\n<h4>Um exemplo do mundo real<\/h4>\n<p>A maioria de n\u00f3s nunca vai se deparar com uma situa\u00e7\u00e3o em que precise criar consultas SQL diretamente. Mas isso n\u00e3o significa que voc\u00ea n\u00e3o esteja usando um banco de dados ou SQL. Felizmente, temos programas ou aplicativos que fazem todo o trabalho pesado por n\u00f3s.<\/p>\n<p>O gerenciador de contatos que voc\u00ea tem no seu computador \u00e9 um desses aplicativos. Para facilitar a sua vida, o aplicativo tem o que \u00e9 chamado de interface gr\u00e1fica do usu\u00e1rio (GUI, na sigla em ingl\u00eas). Quando voc\u00ea olha para a tela, essa GUI \u00e9 o que voc\u00ea est\u00e1 vendo. Se voc\u00ea clicar na letra \"V\", o aplicativo enviar\u00e1 uma solicita\u00e7\u00e3o via SQL para o banco de dados dizendo: \"Estou solicitando todos os registros que t\u00eam um sobrenome que come\u00e7a com a letra V\".<\/p>\n<p>Magicamente, seu gerenciador de contatos agora exibe uma lista de todas as pessoas em seu banco de dados com o sobrenome aplic\u00e1vel. Obviamente, essa \u00e9 uma vers\u00e3o simplificada, mas acho que torna o processo um pouco mais f\u00e1cil de entender.<\/p>\n<p>Basicamente, h\u00e1 quatro a\u00e7\u00f5es que a GUI pode permitir que voc\u00ea execute no banco de dados. S\u00e3o elas:<\/p>\n<ol>\n<li><strong>Modificar<\/strong> uma entrada existente no banco de dados - o endere\u00e7o de seus amigos foi alterado.<\/li>\n<li><strong>Inserir<\/strong> uma nova entrada no banco de dados - voc\u00ea fez um novo amigo.<\/li>\n<li><strong>Remover<\/strong> um registro do banco de dados \u2013 voc\u00ea deixou de ser amigo de algu\u00e9m.<\/li>\n<li><strong>Solicita\u00e7\u00e3o<\/strong> informa\u00e7\u00f5es do banco de dados \u2013 voc\u00ea est\u00e1 tentando encontrar o n\u00famero de telefone de um amigo espec\u00edfico.<\/li>\n<\/ol>\n<p>Embora suas intera\u00e7\u00f5es estejam limitadas a essas quatro categorias, voc\u00ea ainda tem uma quantidade incr\u00edvel de poder na ponta dos dedos quando se trata de manipular os dados.<\/p>\n<h4>Onde voc\u00ea pode saber mais?<\/h4>\n<p>Embora o SQL e o gerenciamento de banco de dados certamente pare\u00e7am um t\u00f3pico \u00e1rido, ele \u00e9 essencial para nossa vida di\u00e1ria. Sem o SQL, como sociedade, provavelmente poder\u00edamos voltar no tempo pelo menos 40 anos. Isso mesmo, de volta aos dias de um <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rolodex\" target=\"_blank\" rel=\"noopener\">Rolodex<\/a>.<\/p>\n<p>Se esta publica\u00e7\u00e3o despertou seu interesse em SQL, h\u00e1 alguns recursos excelentes dispon\u00edveis para ajud\u00e1-lo a aprender mais.<\/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>A maioria de n\u00f3s j\u00e1 recorreu \u00e0 W3school para obter ajuda com CSS e HTML. Acontece que eles tamb\u00e9m t\u00eam um \u00f3timo recurso dispon\u00edvel para aprender sobre SQL. Dito isso, talvez n\u00e3o seja o melhor recurso para iniciantes. Ele \u00e9 bastante direto e n\u00e3o tem exemplos adequados para leigos. Se voc\u00ea \u00e9 uma pessoa que aprende de forma visual e auditiva, nossa pr\u00f3xima fonte pode ser mais adequada.<\/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>A Udemy oferece \u00f3timos cursos que podem te ajudar a aprender mais sobre SQL. H\u00e1 v\u00e1rios cursos gratuitos dispon\u00edveis, mas os de melhor qualidade t\u00eam uma pequena taxa. Se voc\u00ea est\u00e1 decidido a adquirir conhecimentos b\u00e1sicos de SQL, provavelmente \u00e9 aqui que voc\u00ea deve procurar.<\/p>\n<h4>Conclus\u00e3o<\/h4>\n<p>Esperamos que esta postagem tenha lhe dado uma introdu\u00e7\u00e3o b\u00e1sica sobre o que \u00e9 exatamente o SQL e como ele \u00e9 importante para nossas vidas. Se voc\u00ea parar para pensar sobre isso por apenas alguns segundos, perceber\u00e1 o quanto dependemos dos dados todos os dias.<\/p>\n<p>Aprender a usar e a trabalhar com esses dados \u00e9 uma habilidade extremamente valiosa; portanto, se despertamos seu interesse, reserve um tempo para se aprofundar no assunto.<\/p>\n<p><strong>Se voc\u00ea j\u00e1 usou uma interface como <a href=\"https:\/\/www.mysql.com\/\" target=\"_blank\" rel=\"noopener\">MySQL<\/a>Compartilhe suas experi\u00eancias nos coment\u00e1rios.<\/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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