Caveats and Disclaimers
To illustrate some of the behaviors of SQL Server, this volume discusses some undocumented features of the product or undocumented objects, such as internal tables. Some of these are potentially "discoverable" on your own, usually by looking at the definition of the supported functions, procedures, or views. In those cases, I am simply saving you time by providing information that you could have eventually discovered on your own. Another category of undocumented features is undocumented DBCC commands or trace flags, which I introduce only for the purpose of allowing deeper analysis or more thorough observation of certain product behavior. For the most part, these are not discoverable unless someone tells you about them. ...
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