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Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: luhuayi <luhuayi@huawei.com> Co-committed-by: luhuayi <luhuayi@huawei.com>
40 lines
4.3 KiB
HTML
40 lines
4.3 KiB
HTML
<a name="EN-US_TOPIC_0000001860199041"></a><a name="EN-US_TOPIC_0000001860199041"></a>
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<h1 class="topictitle1">SET</h1>
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<div id="body32001227"><p id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_p214310280272"><strong id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_b159034618832336">SET</strong> is a unique feature in Teradata. It does not allow duplicate records. It is addressed using the <strong id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_b173956626732336">MINUS </strong>set operator. Migration tool supports MULTISET and SET tables. SET table can be used with VOLATILE.</p>
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<p id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_p18143128112711"><strong id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_b162243227132336">Input: SET TABLE</strong></p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_screen2736182065718"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
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<span class="normal">2</span>
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<span class="normal">3</span>
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<span class="normal">4</span>
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<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">SET</span><span class="w"> </span><span class="k">VOLATILE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">tab1</span><span class="w"> </span><span class="p">...</span><span class="w"> </span><span class="p">;</span>
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<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">tab1</span>
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<span class="k">SELECT</span><span class="w"> </span><span class="n">expr1</span><span class="p">,</span><span class="w"> </span><span class="n">expr2</span><span class="p">,</span><span class="w"> </span><span class="p">...</span>
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<span class="k">FROM</span><span class="w"> </span><span class="n">tab1</span><span class="p">,</span><span class="w"> </span><span class="p">...</span>
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<span class="k">WHERE</span><span class="w"> </span><span class="p">....</span><span class="w"> </span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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<p id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_p1427613111338"><strong id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_b172765731093928">Output:</strong></p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001860199041__en-us_topic_0000001384230900_screen88344252131"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
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<span class="normal">2</span>
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<span class="normal">3</span>
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<span class="normal">4</span>
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<span class="normal">5</span>
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<span class="normal">6</span>
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<span class="normal">7</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">LOCAL</span><span class="w"> </span><span class="k">TEMPORARY</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">tab1</span><span class="w"> </span>
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<span class="p">...</span><span class="w"> </span><span class="p">;</span><span class="w"> </span><span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">tab1</span>
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<span class="k">SELECT</span><span class="w"> </span><span class="n">expr1</span><span class="p">,</span><span class="w"> </span><span class="n">expr2</span><span class="p">,</span><span class="w"> </span><span class="p">...</span>
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<span class="k">FROM</span><span class="w"> </span><span class="n">tab1</span><span class="p">,</span><span class="w"> </span><span class="p">...</span>
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<span class="k">WHERE</span><span class="w"> </span><span class="p">....</span>
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<span class="n">MINUS</span><span class="w"> </span>
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<span class="k">SELECT</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="n">tab1</span><span class="w"> </span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0061.html">Migrating Tables</a></div>
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</div>
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</div>
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