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<title>READ_FILE Function - SQL Notebook</title>
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<article><div id="article">
<h1><code>READ_FILE</code> Function</h1>
<p>Reads a file line-by-line and returns it in a table. This function is used in the <code>FROM</code> clause of a
<code>SELECT</code> statement and can participate in joins as if it were a table.</p>
<h2>Syntax</h2><code>READ_FILE(<i>file-path</i>, [<i>file-encoding</i>])</code><br>
<h2>Parameters<br></h2>
<ul class="args">
<li><i>file-path</i>: text<br>
The absolute path to the text file to read.</li>
<li>
<i>file-encoding</i>: integer (optional, 0-65535, default: 0)<br>
Indicates the text encoding to use when reading the file. Specify 0 to detect the encoding automatically. Any
nonzero integer is treated as a Windows code page number. See <a moz-do-not-send="true" href=
"character-encodings-in-csv-and-text-files.html">Character Encodings in CSV and Text Files</a> for a list of
these code page numbers.<br>
</li>
</ul>
<h2>Return Value</h2>A table with the following columns:
<table>
<thead>
<tr>
<th>Column name</th>
<th>Example value</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>number</code></td>
<td>1<br></td>
</tr>
<tr>
<td><code>line</code></td>
<td>"First line of the file"</td>
</tr>
</tbody>
</table>
<h2>Example</h2>
<pre><i>-- Returns a table containing the last 50 lines</i><i><br></i><i>-- in "file.txt" in reverse order.</i><br>SELECT *<br>FROM READ_FILE('C:\temp\file.txt')<br>ORDER BY number DESC<br>LIMIT 50;<br><br><i>-- Returns a table containing the contents of</i><i><br></i><i>-- "ShiftJIS.txt", which is read using the Japanese</i><i><br></i><i>-- Shift-JIS encoding (code page 932).</i><br>SELECT * FROM READ_FILE('C:\ShiftJIS.txt', 932);</pre>
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