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diff --git a/databases.html b/databases.html
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                      <div class="card-body">
                         <h5><i class="bi bi-database-gear"></i> PostgreSQL</h5>
                         <div class="card-content-wrapper">
-                            <p class="summary"><a href="https://www.postgresql.org/" target="_blank" rel="noopener noreferrer">Object-Relational DB</a> known for <span class="term">extensibility</span>, <span class="term">standards compliance</span>, data integrity, and advanced features (JSONB, GIS).</p>
+                            <p class="summary"><a href="https://www.postgresql.org/" target="_blank" rel="noopener noreferrer">Object-Relational DB</a> known for <span class="term">extensibility</span>, <span class="term">standards compliance</span>, data integrity, and <a href="https://cheatsheets.davidveksler.com/postgresql.html">advanced features</a> (JSONB, GIS).</p>
                             <button class="btn btn-sm details-toggle" type="button" data-bs-toggle="collapse" data-bs-target="#collapseSQL1" aria-expanded="false" aria-controls="collapseSQL1">
                                 Details <i class="bi bi-chevron-down"></i>
                             </button>