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    <pre><code>SELECT col1, MAX(col3) AS col3, MIN(col2) AS col2, MAX(col4) AS col4 FROM MyTable GROUP BY col1; </code></pre> <p>You showed in your example that you wanted a <code>col4</code> included, but you didn't say which value you want. You have to put that column either in an aggregate function or in the <code>GROUP BY</code> clause. I assumed that taking the max for the group would be acceptable.</p> <hr> <p><strong>update:</strong> Thanks for the clarification. You're asking about a variation of the greatest-n-per-group problem that comes up frequently on Stack Overflow. Here's my usual solution:</p> <pre><code>SELECT t1.* FROM mytable t1 LEFT OUTER JOIN mytable t3 ON t1.col1 = t3.col1 AND t1.col3 &lt; t3.col3 WHERE t3.col1 IS NULL; </code></pre> <p>In English: show me the row (<code>t1</code>) for which no row exists with the same <code>col1</code> and a greater value in <code>col3</code>. Some people write this using a <code>NOT EXISTS</code> subquery predicate, but I prefer the <code>JOIN</code> syntax.</p> <p>Here's the output from my test given your example data:</p> <pre><code>+------+------+------+------+ | col1 | col2 | col3 | col4 | +------+------+------+------+ | 1 | 2 | 1 | a | | 1 | 3 | 1 | a | | 2 | 4 | 1 | b | | 3 | 5 | 0 | c | +------+------+------+------+ </code></pre> <p>Notice that there are two rows for <code>col1</code> value 1, because both rows satisfy the join condition; no other row exists with a <em>greater</em> value in <code>col3</code>.</p> <p>So we need to add another condition to resolve the tie. You want to compare to rows with a <em>lesser</em> value in <code>col2</code> and if no such rows exist, then we've found the row with the least value in <code>col2</code>.</p> <pre><code>SELECT t1.* FROM MyTable t1 LEFT OUTER JOIN MyTable t3 ON t1.col1 = t3.col1 AND t1.col3 &lt; t3.col3 LEFT OUTER JOIN MyTable t2 ON t1.col1 = t2.col1 AND t1.col3 = t2.col3 AND t1.col2 &gt; t2.col2 WHERE t2.col1 IS NULL AND t3.col1 IS NULL; </code></pre> <p>Here's the output from my test given your example data:</p> <pre><code>+------+------+------+------+ | col1 | col2 | col3 | col4 | +------+------+------+------+ | 1 | 2 | 1 | a | | 2 | 4 | 1 | b | | 3 | 5 | 0 | c | +------+------+------+------+ </code></pre> <p>PS: <em>By the way, it's customary on Stack Overflow to edit your original question and add detail, instead of adding answers to your own question that only clarify the question. But I know some actions aren't available to you until you have more than 1 reputation point.</em></p>
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    1. POselect distinct col1 with min(col2) and max(col3) from table
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    1. USBill Karwin
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    1. COGets my vote for not having an unnecessary table alias, but you miss out on bonus points in not naming your column outputs :)
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    2. CO@sidereal: Point taken. I have edited to add column aliases.
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    3. COThanks Bill! It works for me
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