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    <p>So you want:</p> <ul> <li>The alias <code>C</code> to correspond to all rows in the group for a given day, so you can use <code>MAX()</code> and <code>MIN()</code> over the rows in that group.</li> <li>The alias <code>C2</code> to correspond to the last row in a given day.</li> <li>The alias <code>C3</code> to correspond to a row later than <code>C2</code> on the same day. If none is found, i.e. <code>C3.*</code> is NULL, then <code>C2</code> is the latest on that day.</li> </ul> <p>This is often labeled a <code>greatest-n-per-group</code> query, and it comes up frequently on Stack Overflow. Here's a solution that I tested for your test data, but you can follow the tag I added to your question for other solutions and discussion.</p> <p><strong>edit:</strong> I missed the requirement for both opening price and closing price. The following is edited.</p> <pre><code>SELECT DATE_FORMAT(C.`DTE`, '%m/%d/%Y') AS trading_day, MIN(C.`PRICE`) AS min_price, MAX(C.`PRICE`) AS max_price, Copen.`PRICE` AS opening_price, Cclose.`PRICE` AS closing_price FROM `CHART_DATA` AS C INNER JOIN `CHART_DATA` AS Cclose ON DAY(C.`DTE`) = DAY(Cclose.`DTE`) LEFT OUTER JOIN `CHART_DATA` AS Cclose_later ON DAY(C.`DTE`) = DAY(Cclose_later.`DTE`) AND Cclose.`DTE` &lt; Cclose_later.`DTE` INNER JOIN `CHART_DATA` AS Copen ON DAY(C.`DTE`) = DAY(Copen.`DTE`) LEFT OUTER JOIN `CHART_DATA` AS Copen_earlier ON DAY(C.`DTE`) = DAY(Copen_earlier.`DTE`) AND Copen.`DTE` &lt; Copen_earlier.`DTE` WHERE Cclose_later.`DTE` IS NULL AND Copen_earlier .`DTE` IS NULL GROUP BY trading_day; </code></pre>
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    1. POHow to use Group By and self-join to return min, max, open, and close daily price restult set?
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    1. USLee
    1. USBill Karwin
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    1. POHow to use Group By and self-join to return min, max, open, and close daily price restult set?
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    1. COWhat does this query look like if you include the `opening_price` as well as the `closing_price`, as the orignal problem requested?
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    2. CO@Lee: Thanks, I've edited with that in mind. Your answer is looking more readable, though mine may perform better with the right indexes.
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