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Here's is a description of the two from microsoft. &nbsp;<a href="http://msdn.microsoft.com/en-us/library/ms175109(SQL.90).aspx" rel="ugc nofollow">http://msdn.microsoft.com/en-us/library/ms175109(SQL.90).aspx</a>
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Here's is a description of the two from microsoft.  http://msdn.microsoft.com/en-us/library/ms175109(SQL.90).aspx [http://msdn.microsoft.com/en-us/library/ms175109(SQL.90).aspx]

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I read that before. &nbsp;I do not understand what's &quot;Physical storage type&quot; and &quot;Extended user type&quot;. And how xtype and xusertype are used in differnt situations?<br />

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I read that before.  I do not understand what's "Physical storage type" and "Extended user type". And how xtype and xusertype are used in differnt situations?


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What's the differnce between xtype and xusertype in systypes?<br />
It seems that they are the same for all types except &quot;sysname&quot;
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What's the differnce between xtype and xusertype in systypes?
It seems that they are the same for all types except "sysname"

What's the differnce between xtype and xusertype in systypes

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

Microsoft SQL Server 2005 is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning. It includes support for managing XML data and allows a database server to be exposed over web services using Tabular Data Stream (TDS) packets encapsulated within SOAP (protocol) requests.