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Why use a HAVING clause at all? Doesn't seem like it is needed. &nbsp;Wouldn't it be more efficient to filter in the WHERE clause?
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Why use a HAVING clause at all? Doesn't seem like it is needed.  Wouldn't it be more efficient to filter in the WHERE clause?

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Can you tell me where the error is?<br />
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Error in query

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 2008 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. Major improvements include the  Always On technologies and support for unstructured data types.

Microsoft SQL Server 2008

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