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POSQL query to return difference between table joined to itself
 

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    <p>I'm using SQL Server 2012.</p> <p>I have a view called <strong>AdvApp.vPortfolioGroupMemberFlattened</strong> I want to return all memberid's that are in portfoliogroupcode <strong>master</strong> or portfoliogroupcode <strong>open</strong> but are not in both groups. I don't care about members in other groups.</p> <p>The following stackoverflow article is close to what I need, but doesn't seem to work when joining a table to itself.</p> <p><a href="https://stackoverflow.com/questions/2077807/sql-query-to-return-differences-between-two-tables">sql query to return differences between two tables</a>. </p> <p>This is my table.</p> <pre><code>PortfolioGroupCode MemberID MemberCode master 316 abc master 317 def open 316 abc open 317 def open 321 ghi master 322 jkl closed 89 lmn </code></pre> <p>This is my desired result showing the delta between members of master and open.</p> <pre><code>PortfolioGroupCode MemberID MemberCode open 321 ghi master 322 jkl </code></pre> <p>I tried the following two queries, both from the aforementioned article.</p> <pre><code>SELECT A.*, B.* FROM [AdvApp].[vPortfolioGroupMemberFlattened] a FULL JOIN [AdvApp].[vPortfolioGroupMemberFlattened] b ON (A.PortfolioGroupCode = B.PortfolioGroupCode) WHERE A.PortfolioGroupCode IS NULL OR B.PortfolioGroupCode IS NULL </code></pre> <p>AND</p> <pre><code>SELECT DISTINCT a.membercode, a.portfoliogroupcode FROM [AdvApp].[vPortfolioGroupMemberFlattened] a WHERE ( NOT EXISTS ( SELECT b.membercode FROM [AdvApp].[vPortfolioGroupMemberFlattened] b WHERE a.PortfolioGroupCode = 'master' AND b.PortfolioGroupCode = 'open' )) </code></pre>
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