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    <p>As you've discovered, doing this with ColdFusion's <code>&lt;cfspreadsheet/&gt;</code> tag fails because it builds the entire document in memory, which leads to JVM OutOfMemory errors. What you need is something that buffers output to disk so you don't run out of memory. This suggests CSV, which is far easier to buffer. I imagine there are ways to do it with Excel as well, but I don't know them. </p> <p>So two options for you:</p> <ol> <li>use a Java library </li> <li>use ColdFusion's <code>fileOpen()</code>, <code>fileWrite()</code>, <code>fileClose()</code> methods</li> </ol> <p>I'll cover each in turn.</p> <h2>Java Libary</h2> <p><a href="http://opencsv.sourceforge.net/" rel="nofollow">opencsv</a> is my preference. This assumes of course you know how to setup a .jar on the ColdFusion classpath. If you do then it's a matter using its APIs to open a file and specify data for each line. It's really quite simple. Check its docs for examples. </p> <h2>ColdFusion Methods</h2> <p><em><strong>Be forewarned there be dragons here</em></strong>. </p> <p>If you are exporting numbers or strings that do not contain any double quotes or commas you can probably do this. If not, figuring out what to escape and how is why you use a library in the first place. Code is roughly as such: </p> <pre><code>&lt;!--- query to get whatever data you're working with ---&gt; &lt;cfset csvFile = fileOpen(filePath, 'read')&gt; &lt;cfloop query="yourQuery"&gt; &lt;cfset csvRow = ""&gt;&lt;!--- construct a csv row here from the query row ---&gt; &lt;cfset fileWrite(csvFile, csvRow)&gt; &lt;/cfloop&gt; &lt;cfset fileClose(csvFile)&gt; </code></pre> <p>If the query data you're working with is also large you may be dealing with a nested loop to chunk it out. </p>
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    1. POExporting hundreds of thousands of records with ColdFusion
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    1. COHow do you chunk out the data from sql server to begin with. Does it return all 1 million rows to coldfusion? What I'm wondering is there a way to specify a batch size in cfquery and get the data in chunks.
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    2. CO@KobbyPemson: paging over data in SQL Server uses the function `ROW_NUMBER([ORDER BY CLAUSE])` - see the following link for an example: http://www.15seconds.com/issue/070628.htm
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