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<title>SQL pour les tung tung tung sahur (22/01/26) - Les incroyables notes de devops</title>
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<p><img src="https://media1.tenor.com/m/EeiKHgyVQR8AAAAC/silencio.gif" alt="tuto ytb sql">
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<em>florian quand je lui demande de l'aide</em></p>
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<h1 id="sql-pour-les-tung-tung-tung-sahur-220126">SQL pour les tung tung tung sahur (22/01/26)</h1>
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<h2 id="modele-mvc">Modèle MVC</h2>
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<blockquote>
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<p>Le modèle MVC est une façon de concevoir un projet logiciel, en gros on sépare celui-ci en trois grandes parties distinctes séparant la logique de la vue et rend le travail plus facile.</p>
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<p><img src="https://developer.mozilla.org/en-US/docs/Glossary/MVC/model-view-controller-light-blue.png" alt="Modèle MVC par MDN" width="200px"></p>
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<p>Modèle MVC en prenant celui de grabber par exemple :</p>
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<pre><code>- Model = Base De Donnée (ex: EMPLOYEES, COMPUTERS)
|
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- View = Tableau de bord, Site
|
|
- Controller = Cerveau qui dirige les deux parties Model et View (ex: app.py)
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|
</code></pre>
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<h2 id="tuto-comment-cr2er-une-bdd-sql-facilement-en-2-minutes-super-facile">TUTO : COMMENT CR2ER UNE BDD SQL FACILEMENT EN 2 MINUTES (SUPER FACILE)</h2>
|
|
<h3 id="structure-dune-base-de-donnees">Structure d'une Base De Données</h3>
|
|
<p><em>celle de grabber pour l'exemple</em></p>
|
|
<div class="highlight"><pre><span></span><code>BDD (Etape 1) - grabberman
|
|
├── TABLES (Etape 2) - COMPUTERS
|
|
│ ├── Colonne (Etape 3) - PcId, entier/clé primaire
|
|
│ │ └── Donnée (Etape 4)
|
|
│ ├── Colonne (Etape 3) - Hostname, chaîne de charactère
|
|
│ └── Colonne (Etape 3) - MacAddress, chaîne de charactère
|
|
└── TABLES (Etape 2) - EMPLOYEES
|
|
├── Colonne (Etape 3) - UserId, entier/clé primaire
|
|
├── Colonne (Etape 3) - Username, chaîne de charactère
|
|
└── Colonne (Etape 3) - PcId, clé secondaire
|
|
</code></pre></div>
|
|
<h3 id="etape-1-creer-une-bdd">Etape 1 : Créer une BDD</h3>
|
|
<p><code>sqlite3 grabberman.db</code> <- Commande qui crée une DB qu'on appellera ici "grabberman"</p>
|
|
<h3 id="etape-2-creer-une-table">Etape 2 : Créer une table</h3>
|
|
<div class="highlight"><pre><span></span><code><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">"COMPUTERS"</span><span class="w"> </span>
|
|
<span class="p">(</span>
|
|
<span class="w"> </span><span class="n">PcId</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="w"> </span><span class="n">AUTOINCREMENT</span><span class="p">,</span><span class="w"> </span>
|
|
<span class="w"> </span><span class="n">Hostname</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span><span class="w"> </span>
|
|
<span class="w"> </span><span class="n">MacAddress</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span>
|
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<span class="p">);</span>
|
|
</code></pre></div>
|
|
<div class="admonition note">
|
|
<p class="admonition-title">Note</p>
|
|
<p>Ici on crée une table dans laquelle on stockera des données (des PC que l'on grab par exemple)</p>
|
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</div>
|
|
<h3 id="etape-3-ajouter-des-donnees-dans-une-table">Etape 3 : Ajouter des données dans une table</h3>
|
|
<p><code>INSERT into COMPUTERS (Hostname, MacAddress) VALUES ('mypc', '1B:12:F0:FL:94');</code></p>
|
|
<div class="admonition note">
|
|
<p class="admonition-title">Note</p>
|
|
<p>Pour ajouter une donnée dans une tableau, on <strong>INSERE</strong> dans le <strong>TABLEAU</strong> donné les <strong>VALEURS</strong> dans les <strong>Colonnes</strong></p>
|
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</div>
|
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<h3 id="etape-4-creer-un-autre-tableau-avec-une-cle-liee-foreign-key">Etape 4 : Créer un autre tableau avec une clé liée (foreign key)</h3>
|
|
<div class="highlight"><pre><span></span><code><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">"EMPLOYEES"</span><span class="w"> </span>
|
|
<span class="p">(</span>
|
|
<span class="w"> </span><span class="n">UserId</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="w"> </span><span class="n">AUTOINCREMENT</span><span class="p">,</span><span class="w"> </span>
|
|
<span class="w"> </span><span class="n">Username</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span><span class="w"> </span>
|
|
<span class="w"> </span><span class="k">FOREIGN</span><span class="w"> </span><span class="k">KEY</span><span class="w"> </span><span class="p">(</span><span class="n">PcId</span><span class="p">)</span><span class="w"> </span><span class="k">REFERENCES</span><span class="w"> </span><span class="n">COMPUTERS</span><span class="p">(</span><span class="n">PcId</span><span class="p">)</span>
|
|
<span class="p">);</span>
|
|
</code></pre></div>
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<div class="admonition note">
|
|
<p class="admonition-title">Note</p>
|
|
<p>On recommence comme à l'étape 2, en ajoutant une clé étrangère <strong>foreign key</strong>, qui lie une clé extérieure, <strong>PcId</strong> ici, dans notre second Tableau</p>
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