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    <p>I've written some SQL to get the results you want here: <a href="http://www.sqlfiddle.com/#!2/1a54a/1" rel="nofollow">http://www.sqlfiddle.com/#!2/1a54a/1</a></p> <p>The following is the code. I'm not sure how well this would perform but you could try it:</p> <pre><code>SET @bbinSize = 0.1; SET @lbinSize = 0.1; SET @kbinSize = 1; SELECT bbin, lbin, kbin, COUNT(*) FROM ( SELECT a.b, a.l, a.k_1AperMag1, ((FLOOR(((1 / @bbinSize) * a.b)) * @bbinSize) + @bbinSize / 2) bbin, ((FLOOR(((1 / @lbinSize) * a.l)) * @lbinSize) + @lbinSize / 2) lbin, ((FLOOR(((1 / @kbinSize) * a.k_1AperMag1)) * @kbinSize) + @kbinSize / 2) kbin FROM MyTable a ) bins GROUP BY bbin, lbin, kbin </code></pre> <p>What might be a better idea would be to create three new tables, <code>BBin</code>, <code>LBin</code> and <code>KBin</code> each of which contain three columns <code>Name</code>, <code>MinValue</code>, <code>MaxValue</code>. Then you populate each bin into these.</p> <p>Your query could then become something like:</p> <pre><code>SELECT BBin.Name, LBin.Name, KBin.Name COUNT(*) as MyCount FROM MyTable LEFT JOIN BBin ON MyTable.B &gt;= BBin.MinValue AND MyTable.B &lt; BBin.MaxValue LEFT JOIN LBin ON MyTable.L &gt;= LBin.MinValue AND MyTable.L &lt; LBin.MaxValue LEFT JOIN KBin ON MyTable.KAperMag1 &gt;= KBin.MinValue AND MyTable.KAperMag1 &lt; KBin.MaxValue GROUP BY BBin.Name LBin.Name KBin.Name </code></pre> <p>I'd suspect the second option would perform better but I'll leave that to you to test.</p>
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    1. COOooh, this looks promising! I'll try it out and let you know. Cheers.
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    2. COThe first bit of code worked perfectly, thanks a lot! I guess I need to learn more about virtual tables in SQL... Here's a preliminary output image at low resolution: https://lh6.googleusercontent.com/-si0Hi9R4Wkw/UIbIBGy0v4I/AAAAAAAABao/YeFQbzIvJnc/s896/Screenshot-1.png I might give the second method a go but that would probably be more tedious when it comes to repeating queries in the future.
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    3. CO@Durand Glad it worked for you. There's nothing about virtual tables there (I'm not even sure what they are). All I did was a calculation on the values. Im think the algorithm will only work for powers of 10 in the bins, i.e. widths of 10, 1, 0.1, 0.01 etc. It might work for other sizes but I'm not sure
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