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| <h1 class="title">USE Database</h1> |
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| <h3 id="description">Description</h3> |
| |
| <p><code class="language-plaintext highlighter-rouge">USE</code> statement is used to set the current database. After the current database is set, |
| the unqualified database artifacts such as tables, functions and views that are |
| referenced by SQLs are resolved from the current database. |
| The default database name is ‘default’.</p> |
| |
| <h3 id="syntax">Syntax</h3> |
| |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="n">USE</span> <span class="n">database_name</span> |
| </code></pre></div></div> |
| |
| <h3 id="parameter">Parameter</h3> |
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| <ul> |
| <li> |
| <p><strong>database_name</strong></p> |
| |
| <p>Name of the database will be used. If the database does not exist, an exception will be thrown.</p> |
| </li> |
| </ul> |
| |
| <h3 id="examples">Examples</h3> |
| |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="c1">-- Use the 'userdb' which exists.</span> |
| <span class="n">USE</span> <span class="n">userdb</span><span class="p">;</span> |
| |
| <span class="c1">-- Use the 'userdb1' which doesn't exist</span> |
| <span class="n">USE</span> <span class="n">userdb1</span><span class="p">;</span> |
| <span class="n">Error</span><span class="p">:</span> <span class="n">org</span><span class="p">.</span><span class="n">apache</span><span class="p">.</span><span class="n">spark</span><span class="p">.</span><span class="k">sql</span><span class="p">.</span><span class="n">catalyst</span><span class="p">.</span><span class="n">analysis</span><span class="p">.</span><span class="n">NoSuchDatabaseException</span><span class="p">:</span> <span class="k">Database</span> <span class="s1">'userdb1'</span> <span class="k">not</span> <span class="k">found</span><span class="p">;</span> |
| <span class="p">(</span><span class="k">state</span><span class="o">=</span><span class="p">,</span><span class="n">code</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span> |
| </code></pre></div></div> |
| |
| <h3 id="related-statements">Related Statements</h3> |
| |
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| <li><a href="sql-ref-syntax-ddl-create-database.html">CREATE DATABASE</a></li> |
| <li><a href="sql-ref-syntax-ddl-drop-database.html">DROP DATABASE</a></li> |
| <li><a href="sql-ref-syntax-ddl-create-table.html">CREATE TABLE </a></li> |
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