近期价格处于降价趋势（至少调了3次）的所有商品代码,MSSQL代码库,德仔网

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代码分类
【MSSQL】近期价格处于降价趋势（至少调了3次）的所有商品
作者:Dezai.CN / 发布于2011/6/30/ 460
<div><span style="color: rgb(0,128,128)">--</span><span style="color: rgb(0,128,128)"><strong>近期价格处于降价趋势（至少调了3次）的所有商品</strong></span><span style="color: rgb(0,128,128)"> 
</span><span style="color: rgb(0,0,255)">if</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,255)">object_id</span><span style="color: rgb(0,0,0)">(</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">[tb]</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">) </span><span style="color: rgb(0,0,255)">is</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">not</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">null</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">drop</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">table</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">tb</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)"> 
</span><span style="color: rgb(0,0,255)">go</span><span style="color: rgb(0,0,0)"> 
</span><span style="color: rgb(0,0,255)">create</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">table</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">tb</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)">(</span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">日期</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">datetime</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">商品编码</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">varchar</span><span style="color: rgb(0,0,0)">(</span><span style="color: rgb(128,0,0); font-weight: bold">6</span><span style="color: rgb(0,0,0)">),</span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">价格</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)"> numeric(</span><span style="color: rgb(128,0,0); font-weight: bold">3</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(128,0,0); font-weight: bold">1</span><span style="color: rgb(0,0,0)">)) 
</span><span style="color: rgb(0,0,255)">insert</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">[</span><span style="color: rgb(255,0,0)">tb</span><span style="color: rgb(255,0,0)">]</span><span style="color: rgb(0,0,0)"> 
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</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091101</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">033002</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0); font-weight: bold">30.5</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">union</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">all</span><span style="color: rgb(0,0,0)"> 
</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091101</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">033003</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0); font-weight: bold">2</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">union</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">all</span><span style="color: rgb(0,0,0)"> 

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</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091103</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">033003</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0); font-weight: bold">2.5</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">union</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">all</span><span style="color: rgb(0,0,0)"> 

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</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091104</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">033003</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0); font-weight: bold">2.5</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">union</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">all</span><span style="color: rgb(0,0,0)"> 

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</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091106</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">,</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">033001</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)">, </span><span style="color: rgb(128,0,0); font-weight: bold">11.5</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">union</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">all</span><span style="color: rgb(0,0,0)"> 
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</span><span style="color: rgb(0,128,128)">--</span><span style="color: rgb(0,128,128)">------------开始查询--------------------------</span><span style="color: rgb(0,128,128)"> 
</span><span style="color: rgb(0,0,255)">with</span><span style="color: rgb(0,0,0)"> cte2 </span><span style="color: rgb(0,0,255)">as</span><span style="color: rgb(0,0,0)"> 
(</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> row_number() </span><span style="color: rgb(0,0,255)">over</span><span style="color: rgb(0,0,0)"> (partition </span><span style="color: rgb(0,0,255)">by</span><span style="color: rgb(0,0,0)"> 商品编码 </span><span style="color: rgb(0,0,255)">order</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">by</span><span style="color: rgb(0,0,0)"> 价格 </span><span style="color: rgb(0,0,255)">desc</span><span style="color: rgb(0,0,0)">) </span><span style="color: rgb(0,0,255)">as</span><span style="color: rgb(0,0,0)"> denserank,</span><span style="color: rgb(128,128,128)">*</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">from</span><span style="color: rgb(0,0,0)"> tb) 
</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">*</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">from</span><span style="color: rgb(0,0,0)"> cte2 
</span><span style="color: rgb(0,0,255)">where</span><span style="color: rgb(0,0,0)"> 商品编码 </span><span style="color: rgb(128,128,128)">in</span><span style="color: rgb(0,0,0)"> (</span><span style="color: rgb(0,0,255)">select</span><span style="color: rgb(0,0,0)"> 商品编码 </span><span style="color: rgb(0,0,255)">from</span><span style="color: rgb(0,0,0)"> cte2 </span><span style="color: rgb(0,0,255)">where</span><span style="color: rgb(0,0,0)"> 日期</span><span style="color: rgb(128,128,128)">=</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(255,0,0)">20091108</span><span style="color: rgb(255,0,0)">'</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(128,128,128)">and</span><span style="color: rgb(0,0,0)"> denserank</span><span style="color: rgb(128,128,128)">>=</span><span style="color: rgb(128,0,0); font-weight: bold">3</span><span style="color: rgb(0,0,0)">) 
</span><span style="color: rgb(0,0,255)">order</span><span style="color: rgb(0,0,0)"> </span><span style="color: rgb(0,0,255)">by</span><span style="color: rgb(0,0,0)"> 商品编码,日期 

</span><span style="color: rgb(0,128,128)">/*</span><span style="color: rgb(0,128,128)"> 
denserank 日期 商品编码 价格 
---------------------------------- 
1 2009-11-01 033001 11.9 
2 2009-11-02 033001 11.9 
3 2009-11-03 033001 11.5 
4 2009-11-04 033001 11.5 
5 2009-11-05 033001 11.5 
6 2009-11-06 033001 11.5 
7 2009-11-07 033001 11.0 
8 2009-11-08 033001 10.8 
4 2009-11-01 033002 30.5 
5 2009-11-02 033002 30.0 
3 2009-11-03 033002 30.5 
2 2009-11-04 033002 30.5 
1 2009-11-05 033002 30.5 
6 2009-11-06 033002 30.0 
8 2009-11-07 033002 30.0 
7 009-11-08 033002 30.0 
</span><span style="color: rgb(0,128,128)">*/</span><span style="color: rgb(0,0,0)"> 


</span></div>
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