63 lines
3.8 KiB
HTML
63 lines
3.8 KiB
HTML
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<meta name="abstract" content="Suppose you want to know which products sold more in the U.S. than in Canada and Germany for the month of March, 2003 (3/03)." />
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<title>Example: Comparisons involving UDTs</title>
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<body id="rbafyudtcomp"><a name="rbafyudtcomp"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Comparisons involving UDTs</h1>
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<div><p>Suppose you want to know which products sold more in the U.S. than
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in Canada and Germany for the month of March, 2003 (3/03).</p>
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<div class="section"><p>Issue the following SELECT statement: </p>
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<pre> <strong>SELECT</strong> US.PRODUCT_ITEM, US.TOTAL
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<strong>FROM</strong> US_SALES <strong>AS</strong> US, CANADIAN_SALES <strong>AS</strong> CDN, GERMAN_SALES <strong>AS</strong> GERMAN
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<strong>WHERE</strong> US.PRODUCT_ITEM = CDN.PRODUCT_ITEM
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<strong>AND</strong> US.PRODUCT_ITEM = GERMAN.PRODUCT_ITEM
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<strong>AND</strong> US.TOTAL > US_DOLLAR (CDN.TOTAL)
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<strong>AND</strong> US.TOTAL > US_DOLLAR (GERMAN.TOTAL)
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<strong>AND</strong> US.MONTH = 3
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<strong>AND</strong> US.YEAR = 2003
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<strong>AND</strong> CDN.MONTH = 3
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<strong>AND</strong> CDN.YEAR = 2003
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<strong>AND</strong> GERMAN.MONTH = 3
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<strong>AND</strong> GERMAN.YEAR = 2003</pre>
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</div>
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<div class="section"><p>Because you cannot directly compare U.S. dollars
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with Canadian dollars or Euros, you use the UDF to cast the amount in Canadian
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dollars to U.S. dollars, and the UDF to cast the amount in Euros to U.S.
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dollars. You cannot cast them all to DECIMAL and compare the converted DECIMAL
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values because the amounts are not monetarily comparable as they are not in
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the same currency. </p>
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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="rbafyexampudt.htm" title="These are examples of using UDTs.">Examples: Use UDTs</a></div>
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</div>
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