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POMySQL summing value across date range
 

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    <p>I have a table with each row containing a date and some arbitrary, numeric value. I need to sum this value for a specific but dynamic date interval.</p> <pre><code>SELECT VERSION(); 5.0.51a-24+lenny5 CREATE TABLE IF NOT EXISTS `work_entries` ( `entry_id` int(10) unsigned NOT NULL auto_increment, `employee_id` tinyint(3) unsigned NOT NULL, `work_date` date NOT NULL, `hour_count` tinyint(3) unsigned NOT NULL, PRIMARY KEY (`entry_id`) ); INSERT INTO `work_entries` (`entry_id`, `employee_id`, `work_date`, `hour_count`) VALUES (1, 1, '2011-04-25', 2), (2, 1, '2011-04-26', 3), (3, 1, '2011-04-27', 1), (4, 2, '2011-04-25', 2), (5, 2, '2011-04-27', 4), (6, 1, '2011-05-08', 2), (7, 2, '2011-05-06', 8), (8, 2, '2011-05-08', 9), (9, 2, '2011-05-09', 1), (10, 1, '2011-05-29', 3), (11, 1, '2011-05-30', 1), (12, 2, '2011-05-30', 2), (13, 1, '2011-06-02', 2), (14, 1, '2011-06-04', 3), (15, 1, '2011-06-14', 1), (16, 2, '2011-06-14', 2), (17, 2, '2011-06-17', 4), (18, 1, '2011-06-18', 2), (19, 2, '2011-06-19', 8), (20, 2, '2011-06-26', 9), (21, 2, '2011-07-01', 1), (22, 1, '2011-07-03', 3), (23, 1, '2011-07-03', 1), (24, 2, '2011-07-16', 2); </code></pre> <p>The following query returns the correct output for the above data set and should illustrate what I'm trying to do, however, I need to generate the year and month values based on <code>work_date</code>. The days (16, 15) never change. Specifically, this query will produce two rows, one for the specified interval and one for the rest, where I need one row for each period (16th of month N to 15th of month N+1 for all months with values).</p> <pre><code>SELECT SUM(hour_count) AS res FROM `work_entries` GROUP BY work_date BETWEEN '2011-04-16' AND '2011-05-15'; -- Outputs res ---- 44 32 -- Should give res ---- 32 14 28 2 </code></pre> <p>An alternative example that works correctly but on the wrong interval (days 01-31):</p> <pre><code>SELECT SUM(hour_count) AS res FROM `work_entries` GROUP BY MONTH(work_date); -- Outputs res --- 12 26 31 7 </code></pre> <p>Additionally, if there is a way to output the from- and to- dates at the same time I'd like that as well, but that's not very important.</p>
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    1. COCan you add to it what the result set you want to see is? It's not clear from the description.
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