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    <p>Well, not so elegant, but working solution using <code>GROUP_CONCAT</code> aggregate function and variables within <code>SELECT</code> to groups similar consecutive days.</p> <p>Your schema and example data set:</p> <pre><code>CREATE TABLE movies ( id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, title CHAR(64) NOT NULL ); CREATE TABLE schedule ( id INT NOT NULL AUTO_INCREMENT PRIMARY KEY, time TIMESTAMP NOT NULL, movie_id INT NOT NULL ); INSERT INTO movies (title) VALUES ('Iron Man 3'), ('Second Movie') ; INSERT INTO schedule (time, movie_id) VALUES ('2013-06-03 19:00:00', 1), ('2013-06-03 22:00:00', 2), ('2013-06-04 19:00:00', 1), ('2013-06-04 22:00:00', 2), ('2013-06-05 19:00:00', 1), ('2013-06-05 22:00:00', 2), ('2013-06-06 19:00:00', 1), ('2013-06-06 22:00:00', 2), ('2013-06-07 19:00:00', 1), ('2013-06-07 22:00:00', 2), ('2013-06-08 20:00:00', 1), ('2013-06-09 19:00:00', 1), ('2013-06-09 22:00:00', 2), ('2013-06-10 19:00:00', 1), ('2013-06-10 22:00:00', 2), ('2013-06-11 19:00:00', 1), ('2013-06-11 22:00:00', 2), ('2013-06-13 19:00:00', 1), ('2013-06-13 22:00:00', 2) ; </code></pre> <p>The query:</p> <pre><code>SELECT DATE_FORMAT(min_date, '%e/%c/%Y') AS beg_date, DATE_FORMAT(max_date, '%e/%c/%Y') AS end_date, title, LOWER(TIME_FORMAT(time, '%l%p')) AS `movie_time` FROM (SELECT MIN(min_date) AS min_date, MAX(max_date) AS max_date, range_schedule FROM (SELECT @min_date := IF(@range_schedule &lt;=&gt; day_schedule AND days.date &lt;=&gt; ADDDATE(@max_date, 1), @min_date, days.date ) AS min_date, @max_date := days.date AS max_date, @range_schedule := days.day_schedule AS range_schedule FROM ( SELECT DATE(time) AS `date`, GROUP_CONCAT(CONCAT(TIME(time), '-', movie_id) ORDER BY time) AS day_schedule FROM schedule GROUP BY DATE(time) ORDER BY DATE(time) ) AS days, (SELECT @min_date := '0000-00-00', @max_date := '0000-00-00', @range_schedule := NULL ) r ) days_of_ranges GROUP BY min_date, range_schedule ) ranges JOIN schedule ON DATE(schedule.time) = ranges.min_date JOIN movies ON movies.id = movie_id ORDER BY min_date, time ; </code></pre> <p>And the result:</p> <pre><code>| BEG_DATE | END_DATE | TITLE | MOVIE_TIME | ----------------------------------------------------- | 3/6/2013 | 7/6/2013 | Iron Man 3 | 7pm | | 3/6/2013 | 7/6/2013 | Second Movie | 10pm | | 8/6/2013 | 8/6/2013 | Iron Man 3 | 8pm | | 9/6/2013 | 11/6/2013 | Iron Man 3 | 7pm | | 9/6/2013 | 11/6/2013 | Second Movie | 10pm | | 13/6/2013 | 13/6/2013 | Iron Man 3 | 7pm | | 13/6/2013 | 13/6/2013 | Second Movie | 10pm | </code></pre> <p>All that you need to do in PHP is to store last <code>BEG_DATE</code> and <code>END_DATE</code> values to compare them with current ones to decide when to output range header.</p>
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    1. COThat seems to work perfectly, except it doesnt recognise the day breaks. For example if the only thing I have in the database is 3 Iron Man Movies all at 7AM, on the 3rd, 12th and 20th, it will make my beginning date the 3rd, and the end date the 20th. Rather than returning 3 options.
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    2. COHm, really. Fixed that.
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