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    <p>I think you need two separate queries. First one to bring back the customers, once a customer such as Bob is selected a second query is performed based on Bob's attributes. </p> <p>A simple example would be a forms application that has two grids. The first displays a list of the users. When you select one of the users the second grid is populated with the results of the second query.</p> <p>The second query would be something like:</p> <pre><code>SELECT NAME, AGE, ZIPCODE, INCOME, FAVECOLOR, FAVEFOOD, FAVEMUSIC FROM [Amazon].[dbo].[Customers] WHERE Age = @BobsAge AND ZipCode = @BobsZipCode AND Income = @BobsIncome </code></pre> <p>It sounds like you want a simple self-join:</p> <pre><code>SELECT MatchingCustomers.NAME, MatchingCustomers.AGE, MatchingCustomers.ZIPCODE, MatchingCustomers.INCOME, MatchingCustomers.FAVECOLOR, MatchingCustomers.FAVEFOOD, MatchingCustomers.FAVEMUSIC FROM [Amazon].[dbo].[Customers] SourceCustomer LEFT JOIN [Amazon].[dbo].[Customers] MatchingCustomers ON SourceCustomer.Age = MatchingCustomer.Age AND SourceCustomer.ZipCode = MatchingCustomer.ZipCode AND SourceCustomer.Income = MatchingCustomer.Income WHERE SourceCustomer.Book = 'X' </code></pre> <p>If you want to see the all source customers and all of their matches in a single result set you can remove the where clause and select data SourceCustomer also:</p> <pre><code>SELECT SourceCustomer.Name SourceName, SourceCustomer.Age SourceAge SourceCustomer.ZipCode SourceZipCode, SourceCustomer.Income SourceIncome, MatchingCustomers.NAME, MatchingCustomers.AGE, MatchingCustomers.ZIPCODE, MatchingCustomers.INCOME, MatchingCustomers.FAVECOLOR, MatchingCustomers.FAVEFOOD, MatchingCustomers.FAVEMUSIC FROM [Amazon].[dbo].[Customers] SourceCustomer LEFT JOIN [Amazon].[dbo].[Customers] MatchingCustomers ON SourceCustomer.Age = MatchingCustomer.Age AND SourceCustomer.ZipCode = MatchingCustomer.ZipCode AND SourceCustomer.Income = MatchingCustomer.Income WHERE SourceCustomer.Book = 'X' </code></pre>
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    1. POHow to run multiple SQL queries whose values change?
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    1. COHi, I thought about that, but it seems rather manual. I think there might be hundreds of customers and doing it your way sounds like it would take a very, very long time to compile the results. Do you know if there is a way to automate iterating through each customer (Bob, Mary, Customer #99, Customer #100, etc.)?
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    2. CO@phan How are you going to interact with the results? If you are writing a .net application to retrieve them and process them in some way then the same theory applies, `foreach customer selected { select and process matching customers }`
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    3. COI want to eyeball the results within SQL Server. There is no desire to write a .net application.
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