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POUpdate column to be different aggregate values
 

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  1. POUpdate column to be different aggregate values
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    <p>I am creating a script that for "merging" and deleting duplicate rows from a table. The table contains address information, and uses an integer field for storing information about the email as bit flags (column name lngValue). For example, lngValue &amp; 1 == 1 means its the primary address. </p> <p>There are instances of the same email being entered twice, but sometimes with different lngValues. To resolve this, I need to take the lngValue from all duplicates and assign them to one surviving record and delete the rest. </p> <p>My biggest headache so far as been with the "merging" of the records. What I want to do is bitwise or all lngValues of duplicate records together. Here is what I have so far, which only finds the value of all lngValues bitwise or'ed together. </p> <p>Warning: messy code ahead </p> <pre><code>declare @duplicates table ( lngInternetPK int, lngContactFK int, lngValue int ) insert into @duplicates (lngInternetPK, lngContactFK, lngValue) ( select tblminternet.lngInternetPK, tblminternet.lngContactFK, tblminternet.lngValue from tblminternet inner join (select strAddress, lngcontactfk, count(*) as count from tblminternet where lngValue &amp; 256 &lt;&gt; 256 group by strAddress, lngcontactfk) secondemail On tblminternet.strAddress = secondemail.strAddress and tblminternet.lngcontactfk = secondemail.lngcontactfk where count &gt; 1 and tblminternet.strAddress is not null and tblminternet.lngValue &amp; 256 &lt;&gt; 256 --order by lngContactFK, strAddress ) update @duplicates set lngValue = t.val from (select (sum(dupes.lngValue) &amp; 65535) as val from (select here.lngInternetPK, here.lngContactFK, here.lngValue from tblminternet here inner join (select strAddress, lngcontactfk, count(*) as count from tblminternet where lngValue &amp; 256 &lt;&gt; 256 group by strAddress, lngcontactfk) secondemail On here.strAddress = secondemail.strAddress and here.lngcontactfk = secondemail.lngcontactfk where count &gt; 1 and here.strAddress is not null and here.lngValue &amp; 256 &lt;&gt; 256) dupes, tblminternet this where this.lngContactFK = dupes.lngContactFK ) t where lngInternetPK in (select lngInternetPK from @duplicates) </code></pre> <p>Edit:<br> As requested here is some sample data: </p> <p>Table Name: tblminternet<br> Column Names:<br> lngInternetPK<br> lngContactFK<br> lngValue<br> strAddress </p> <p>Example row 1:<br> lngInternetPK: 1<br> lngContactFK: 1<br> lngValue: 33<br> strAddress: "me@myaddress.com" </p> <p>Example row 2:<br> lngInternetPK: 2<br> lngContactFK: 1<br> lngValue: 40<br> strAddress: "me@myaddress.com" </p> <p>If these two were merged here is the desired result:<br> lngInternetPK: 1<br> lngContactFK: 1<br> lngValue: 41<br> strAddress: "me@myaddress.com" </p> <p>Other necessary rules:<br> Each contact can have multiple emails, but each email row must be distinct ( each email can only appear as one row).</p>
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    1. USCorey Sunwold
    1. USCorey Sunwold
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    1. COAny chance you could share some sample data? Having a look at what the data looks like now as well as the desired result might help generate some answers.
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      1. USBen Griswold
    2. COGriswold: Added data
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      1. USCorey Sunwold
    3. COThanks for posting the data. It helped.
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      1. USBen Griswold
 

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