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    <title>CREATE VIEW &#8212; Trino 444 Documentation</title>
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  <section id="create-view">
<h1 id="sql-create-view--page-root">CREATE VIEW<a class="headerlink" href="#sql-create-view--page-root" title="Permalink to this heading">#</a></h1>
<section id="synopsis">
<h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permalink to this heading">#</a></h2>
<div class="highlight-text notranslate"><div class="highlight"><pre><span></span>CREATE [ OR REPLACE ] VIEW view_name
[ COMMENT view_comment ]
[ SECURITY { DEFINER | INVOKER } ]
AS query
</pre></div>
</div>
</section>
<section id="description">
<h2 id="description">Description<a class="headerlink" href="#description" title="Permalink to this heading">#</a></h2>
<p>Create a new view of a <a class="reference internal" href="select.html"><span class="doc">SELECT</span></a> query. The view is a logical table
that can be referenced by future queries. Views do not contain any data.
Instead, the query stored by the view is executed every time the view is
referenced by another query.</p>
<p>The optional <code class="docutils literal notranslate"><span class="pre">OR</span> <span class="pre">REPLACE</span></code> clause causes the view to be replaced if it
already exists rather than raising an error.</p>
</section>
<section id="security">
<h2 id="security">Security<a class="headerlink" href="#security" title="Permalink to this heading">#</a></h2>
<p>In the default <code class="docutils literal notranslate"><span class="pre">DEFINER</span></code> security mode, tables referenced in the view
are accessed using the permissions of the view owner (the <em>creator</em> or
<em>definer</em> of the view) rather than the user executing the query. This
allows providing restricted access to the underlying tables, for which
the user may not be allowed to access directly.</p>
<p>In the <code class="docutils literal notranslate"><span class="pre">INVOKER</span></code> security mode, tables referenced in the view are accessed
using the permissions of the user executing the query (the <em>invoker</em> of the view).
A view created in this mode is simply a stored query.</p>
<p>Regardless of the security mode, the <code class="docutils literal notranslate"><span class="pre">current_user</span></code> function will
always return the user executing the query and thus may be used
within views to filter out rows or otherwise restrict access.</p>
</section>
<section id="examples">
<h2 id="examples">Examples<a class="headerlink" href="#examples" title="Permalink to this heading">#</a></h2>
<p>Create a simple view <code class="docutils literal notranslate"><span class="pre">test</span></code> over the <code class="docutils literal notranslate"><span class="pre">orders</span></code> table:</p>
<div class="highlight-sql notranslate"><div class="highlight"><pre><span></span><span class="k">CREATE</span> <span class="k">VIEW</span> <span class="n">test</span> <span class="k">AS</span>
<span class="k">SELECT</span> <span class="n">orderkey</span><span class="p">,</span> <span class="n">orderstatus</span><span class="p">,</span> <span class="n">totalprice</span> <span class="o">/</span> <span class="mi">2</span> <span class="k">AS</span> <span class="n">half</span>
<span class="k">FROM</span> <span class="n">orders</span>
</pre></div>
</div>
<p>Create a view <code class="docutils literal notranslate"><span class="pre">test_with_comment</span></code> with a view comment:</p>
<div class="highlight-sql notranslate"><div class="highlight"><pre><span></span><span class="k">CREATE</span> <span class="k">VIEW</span> <span class="n">test_with_comment</span>
<span class="k">COMMENT</span> <span class="s1">'A view to keep track of orders.'</span>
<span class="k">AS</span>
<span class="k">SELECT</span> <span class="n">orderkey</span><span class="p">,</span> <span class="n">orderstatus</span><span class="p">,</span> <span class="n">totalprice</span>
<span class="k">FROM</span> <span class="n">orders</span>
</pre></div>
</div>
<p>Create a view <code class="docutils literal notranslate"><span class="pre">orders_by_date</span></code> that summarizes <code class="docutils literal notranslate"><span class="pre">orders</span></code>:</p>
<div class="highlight-sql notranslate"><div class="highlight"><pre><span></span><span class="k">CREATE</span> <span class="k">VIEW</span> <span class="n">orders_by_date</span> <span class="k">AS</span>
<span class="k">SELECT</span> <span class="n">orderdate</span><span class="p">,</span> <span class="k">sum</span><span class="p">(</span><span class="n">totalprice</span><span class="p">)</span> <span class="k">AS</span> <span class="n">price</span>
<span class="k">FROM</span> <span class="n">orders</span>
<span class="k">GROUP</span> <span class="k">BY</span> <span class="n">orderdate</span>
</pre></div>
</div>
<p>Create a view that replaces an existing view:</p>
<div class="highlight-sql notranslate"><div class="highlight"><pre><span></span><span class="k">CREATE</span> <span class="k">OR</span> <span class="k">REPLACE</span> <span class="k">VIEW</span> <span class="n">test</span> <span class="k">AS</span>
<span class="k">SELECT</span> <span class="n">orderkey</span><span class="p">,</span> <span class="n">orderstatus</span><span class="p">,</span> <span class="n">totalprice</span> <span class="o">/</span> <span class="mi">4</span> <span class="k">AS</span> <span class="n">quarter</span>
<span class="k">FROM</span> <span class="n">orders</span>
</pre></div>
</div>
</section>
<section id="see-also">
<h2 id="see-also">See also<a class="headerlink" href="#see-also" title="Permalink to this heading">#</a></h2>
<p><a class="reference internal" href="drop-view.html"><span class="doc">DROP VIEW</span></a>, <a class="reference internal" href="show-create-view.html"><span class="doc">SHOW CREATE VIEW</span></a></p>
</section>
</section>


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