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POsqllite -- grouping data
 

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    <p>I have the following query</p> <pre><code>SELECT (CASE WHEN cc.country IS NULL THEN dc.country ELSE cc.country END) AS Country,l.band FROM lotw l OUTER LEFT JOIN CountryCode cc on cc.code = l.dxcc OUTER LEFT JOIN DeleteCountry dc on dc.code = l.dxcc WHERE l.DXCC &gt; '' GROUP BY cc.Country,dc.country </code></pre> <p>Which produces the following results</p> <pre><code>Country Band Bonaire 15M St. Maarten 40M Aland Is. 20M Alaska 15M Andorra 80M Antigua &amp; Barbuda 10M Argentina 10M Aruba 10M Ascension Is. 20M Asiatic Russia 40M Austral I. 40M </code></pre> <p>………</p> <p>What I need is to get is a count of each band ? </p> <pre><code> Band Total 10M 50 20M 20 30M 5 </code></pre> <p>So I tried this:</p> <pre><code> select Band,Count(Band) FROM( SELECT (CASE WHEN cc.country IS NULL THEN dc.country ELSE cc.country END) AS Country, l.band FROM lotw l OUTER LEFT JOIN CountryCode cc on cc.code = l.dxcc OUTER LEFT JOIN DeleteCountry dc on dc.code = l.dxcc WHERE l.DXCC &gt; '' GROUP BY cc.Country,dc.country )group by Band </code></pre> <p>This almost worked but the counts are off for example 10M the count should be 79 and its comes up 27?</p> <p>however if I use this query and constrain to the 10M it works but I only get the one band :</p> <pre><code>select Band,Count(Band) FROM( SELECT (CASE WHEN cc.country IS NULL THEN dc.country ELSE cc.country END) AS Country, l.band FROM lotw l OUTER LEFT JOIN CountryCode cc on cc.code = l.dxcc OUTER LEFT JOIN DeleteCountry dc on dc.code = l.dxcc WHERE l.DXCC &gt; '' AND BAND = '10M' GROUP BY cc.Country,dc.country ) </code></pre> <p>Not sure how to go about that.</p>
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