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		<title>sql按分组求最大最小值</title>
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					<description><![CDATA[SQL按某一字段分组取最大(小)值所在行的数据 &#160; 1 --按某一字段分组取最大(小)值所在行的数据 &#160; 2 --&#160; www.moneyslow.com&#160;&#160; &#160; 3 /* &#160; 4 数据如下： &#160; 5 name val memo &#160; 6 a&#160; &#160; 2&#160; &#160;a2(a的第二个值) &#160; 7 a&#160; &#160; 1&#160; &#160;a1--a的第一个值 &#160; 8 a&#160; &#160; 3&#160; &#160;a3:a的第三个值 &#160; 9 b&#160; &#160; 1&#160; &#160;b1--b的第一个值 &#160;10 b&#160; &#160; 3&#160; &#160;b3:b的第三个值 &#160;11 b&#160; &#160; 2&#160; &#160;b2b2b2b2 &#160;12 b&#160; [&#8230;]]]></description>
		
		
		
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