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  12. <title>Conceptual compression means beginners don’t need to know SQL - hallelujah! (archive) — David Larlet</title>
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  437. <h1>
  438. <span><a id="jumper" href="#jumpto" title="Un peu perdu ?">?</a></span>
  439. Conceptual compression means beginners don’t need to know SQL - hallelujah! (archive)
  440. <time>Pour la pérennité des contenus liés. Non-indexé, retrait sur simple email.</time>
  441. </h1>
  442. <section>
  443. <article>
  444. <h3><a href="https://m.signalvnoise.com/conceptual-compression-means-beginners-dont-need-to-know-sql-hallelujah-661c1eaed983">Source originale du contenu</a></h3>
  445. <div class="section-inner sectionLayout--insetColumn"><figure name="6521" id="6521" class="graf graf--figure graf--leading"/><h1 name="a544" id="a544" class="graf graf--h3 graf-after--figure graf--title">Conceptual compression means beginners don’t need to know SQL — hallelujah!</h1><p name="f0f3" id="f0f3" class="graf graf--p graf-after--h3">It used to be a fundamental requirement that you learned an extensive amount of SQL before you were able to start working on database-backed applications. It was taken as self-evident that you needed to speak the native language of the database before you were qualified to use it. And better yet, you really ought to understand and care about your particular brand of database engine.</p><p name="e4af" id="e4af" class="graf graf--p graf-after--p">This is no longer so. That fact has snuck up upon us, but it’s none the less true — and that’s amazing.</p><p name="b804" id="b804" class="graf graf--p graf-after--p">Through advances in leaky abstractions, we’ve managed to compress the conceptual overhead of the database so much that it needn’t feature in the introduction material for making database-backed applications. In Rails, we call that abstraction <a href="http://guides.rubyonrails.org/active_record_basics.html" data-href="http://guides.rubyonrails.org/active_record_basics.html" class="markup--anchor markup--p-anchor" rel="noopener" target="_blank">Active Record</a>, and it falls into the category of object-relational mappers (ORM).</p><p name="2c07" id="2c07" class="graf graf--p graf-after--p">The ORM was long derided by programmers as an unreliable, even harmful, aid of the lazy or the weak. Something Real Programmers shouldn’t expect to lean on, as it was likely to break down if not immediately, then certainly soon thereafter. And then you’d better know all your relational theory!</p><p name="1aa3" id="1aa3" class="graf graf--p graf-after--p">That’s the past.</p><p name="79bc" id="79bc" class="graf graf--p graf-after--p">Basecamp 3 has about 42,000 lines of code, and not a single fully formed SQL statement as part of application logic! It serves millions of people. It not only leans on the ORM abstraction, it hardly even thinks about it the vast majority of the time.</p><p name="9fac" id="9fac" class="graf graf--p graf-after--p">Do you know what else application programmers rarely need to think about any more either? Memory management and garbage collection. It used to be just as foundational to know your pointers, your destructors, your mallocs, and all the other conceptual overhead needed to deal with manually managing memory. Now it isn’t.</p><p name="9f4c" id="9f4c" class="graf graf--p graf-after--p">Our abstraction of SQL isn’t quite yet to the point of our abstraction of memory management, and certain frameworks and environments are further ahead than others, but it’s getting closer. The first version of Basecamp had a bunch of <a href="http://api.rubyonrails.org/classes/ActiveRecord/Querying.html#method-i-find_by_sql" data-href="http://api.rubyonrails.org/classes/ActiveRecord/Querying.html#method-i-find_by_sql" class="markup--anchor markup--p-anchor" rel="noopener" target="_blank">#find_by_sql</a> calls, the latest have none. That’s progress.</p><p name="faaa" id="faaa" class="graf graf--p graf-after--p">It’s not that knowledge of SQL isn’t nice to have. It’s good to know a lot of things. Just like it’s helpful to have a strong conceptual model of how computers deal with memory management. It’s just that you no longer need to know these things to start making applications, and that’s a wonderful thing.</p><p name="9d6a" id="9d6a" class="graf graf--p graf-after--p">SQL, like memory management, is a concept you can unpack when you need to. Further down the line of your career. Then after you learn it, you can compress it back down again and spend more of your mental capacity on other things most of the time. I used to write SQL statements every day. Now maybe I do so once a month? Less? And that’s against a major application that’s reached a scale that most beginner apps never will.</p><p name="8dfa" id="8dfa" class="graf graf--p graf-after--p">Some programmers will scoff at this notion instinctively. That it’s simply <em class="markup--em markup--p-em">irresponsible</em> for programmers to start writing code until they know these historical fundamentals. I suppose it’s natural to think that all the hard work you spent learning the basic concepts — that indeed were required when you got started — should still be taught to all on day one. This is one of the key pitfalls of experience. Falling in love with the trials and tribulations you had to suffer, rather than rejoicing in the fact that the next generation doesn’t have to endure them.</p><p name="1044" id="1044" class="graf graf--p graf-after--p">The relational database is a glorious invention, but for most programmers it doesn’t need to be more than an appliance. Sure, take the time to learn how the drying tumbler machine works, it may well save you a service call to a specialized technician one day. But it’s hardly a requirement for living with such a device and getting your clothes dry.</p><p name="5e0e" id="5e0e" class="graf graf--p graf-after--p">The relegation to “appliance status” isn’t a dig, but an honor. It means we’ve finally made the technology and the abstraction so good that many, if not most, programmers don’t even have to think about it on a daily basis.</p><p name="2b4d" id="2b4d" class="graf graf--p graf-after--p">It also means it’s become a commodity. At Basecamp we happen to use MySQL, but to be honest, it’s basically only for historical and operational reasons. We could switch to PostgreSQL tomorrow, and I wouldn’t really give a damn. We have nothing in the application that relies on a particular brand of the database appliance.</p><p name="0108" id="0108" class="graf graf--p graf-after--p">Building stuff with computers means building on top of abstractions. CPUs, 1s and 0s, assembler, C compilers, database drivers, memory management, and a million other concepts are required to make our applications work. But as we progress as an industry, fewer people need to know all of them, and thank heavens for that.</p><p name="f7ea" id="f7ea" class="graf graf--p graf-after--p">It takes hard work to improve the conceptual compression algorithms that alleviate application programmers from having to worry about the underpinnings most of the time, but it’s incredibly rewarding work. The more effectively we compress the concepts of yesterday, the lower the barriers to entry become. And we need low barriers if we are to get more people started making applications.</p><p name="4e28" id="4e28" class="graf graf--p graf-after--p">SQL is perhaps the brightest example of conceptual compression over the past decade or so, but application work is full of other examples. And we need such conceptual compression more than ever to starve off specialization, and to preserve the power of individual generalists to make complete applications.</p><p name="4414" id="4414" class="graf graf--p graf-after--p">We’re currently living through an explosion of conceptual expansion and experimentation on the client-side in the web application world. That’s really exciting! Lots of new ideas and approaches churning rapidly. But it’s also needlessly intimidating in many ways. We don’t all need to spend hours or days learning how to configure build pipelines. Some day our leaky abstractions will be good enough that the conceptual compression will relegate such tooling to appliance status as well. That will be a good day.</p><p name="cc93" id="cc93" class="graf graf--p graf-after--p">You can’t learn everything. You can’t hold every concept fully expanded in your head. And moreover, you shouldn’t. As we compress formerly fundamental concepts, we make room for new, grander abstractions. These are the leaps of progress it’ll take to continue to make us more efficient and ultimately more effective.</p><p name="235c" id="235c" class="graf graf--p graf-after--p">But I get that it’s hard to break habits. Like the stereotype of an old person complaining about the price of gas or a gallon of milk because their frame of reference is anchored in a time past. Broad-based progress sometimes need that generational churn to really happen (and that’s not about your physical age, rather the years of experience).</p><p name="37cf" id="37cf" class="graf graf--p graf-after--p graf--trailing">Don’t be a fogey. Don’t fight the conceptual compression. Help make it happen.</p></div>
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  451. <a href="https://m.signalvnoise.com/conceptual-compression-means-beginners-dont-need-to-know-sql-hallelujah-661c1eaed983">Source originale</a> |
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  457. <img src="/static/david/david-larlet-avatar.jpg" loading="lazy" class="avatar" width="200" height="200">
  458. <p>
  459. Bonjour/Hi!
  460. Je suis <a href="/david/" title="Profil public">David&nbsp;Larlet</a>, je vis actuellement à Montréal et j’alimente cet espace depuis 15 ans. <br>
  461. Si tu as apprécié cette lecture, n’hésite pas à poursuivre ton exploration. Par exemple via les <a href="/david/blog/" title="Expériences bienveillantes">réflexions bimestrielles</a>, la <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a> ou en t’abonnant au <a href="/david/log/" title="S’abonner aux publications via RSS">flux RSS</a> (<a href="/david/blog/2019/flux-rss/" title="Tiens c’est quoi un flux RSS ?">so 2005</a>).
  462. </p>
  463. <p>
  464. Je m’intéresse à la place que je peux avoir dans ce monde. En tant qu’humain, en tant que membre d’une famille et en tant qu’associé d’une coopérative. De temps en temps, je fais aussi des <a href="https://github.com/davidbgk" title="Principalement sur Github mais aussi ailleurs">trucs techniques</a>. Et encore plus rarement, <a href="/david/talks/" title="En ce moment je laisse plutôt la place aux autres">j’en parle</a>.
  465. </p>
  466. <p>
  467. Voici quelques articles choisis :
  468. <a href="/david/blog/2019/faire-equipe/" title="Accéder à l’article complet">Faire équipe</a>,
  469. <a href="/david/blog/2018/bivouac-automnal/" title="Accéder à l’article complet">Bivouac automnal</a>,
  470. <a href="/david/blog/2018/commodite-effondrement/" title="Accéder à l’article complet">Commodité et effondrement</a>,
  471. <a href="/david/blog/2017/donnees-communs/" title="Accéder à l’article complet">Des données aux communs</a>,
  472. <a href="/david/blog/2016/accompagner-enfant/" title="Accéder à l’article complet">Accompagner un enfant</a>,
  473. <a href="/david/blog/2016/senior-developer/" title="Accéder à l’article complet">Senior developer</a>,
  474. <a href="/david/blog/2016/illusion-sociale/" title="Accéder à l’article complet">L’illusion sociale</a>,
  475. <a href="/david/blog/2016/instantane-scopyleft/" title="Accéder à l’article complet">Instantané Scopyleft</a>,
  476. <a href="/david/blog/2016/enseigner-web/" title="Accéder à l’article complet">Enseigner le Web</a>,
  477. <a href="/david/blog/2016/simplicite-defaut/" title="Accéder à l’article complet">Simplicité par défaut</a>,
  478. <a href="/david/blog/2016/minimalisme-esthetique/" title="Accéder à l’article complet">Minimalisme et esthétique</a>,
  479. <a href="/david/blog/2014/un-web-omni-present/" title="Accéder à l’article complet">Un web omni-présent</a>,
  480. <a href="/david/blog/2014/manifeste-developpeur/" title="Accéder à l’article complet">Manifeste de développeur</a>,
  481. <a href="/david/blog/2013/confort-convivialite/" title="Accéder à l’article complet">Confort et convivialité</a>,
  482. <a href="/david/blog/2013/testament-numerique/" title="Accéder à l’article complet">Testament numérique</a>,
  483. et <a href="/david/blog/" title="Accéder aux archives">bien d’autres…</a>
  484. </p>
  485. <p>
  486. On peut <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">échanger par courriel</a>. Si éventuellement tu souhaites que l’on travaille ensemble, tu devrais commencer par consulter le <a href="http://larlet.com">profil dédié à mon activité professionnelle</a> et/ou contacter directement <a href="http://scopyleft.fr/">scopyleft</a>, la <abbr title="Société coopérative et participative">SCOP</abbr> dont je fais partie depuis six ans. Je recommande au préalable de lire <a href="/david/blog/2018/cout-site/" title="Attention ce qui va suivre peut vous choquer">combien coûte un site</a> et pourquoi je suis plutôt favorable à une <a href="/david/pro/devis/" title="Discutons-en !">non-demande de devis</a>.
  487. </p>
  488. <p>
  489. Je ne traque pas ta navigation mais mon
  490. <abbr title="Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33.184162340">hébergeur</abbr>
  491. conserve des logs d’accès.
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