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Using correlated sub-queries in SQL Server

A sub-query is a SQL Server statement embedded inside of another SQL Server statement. The database engine treats a sub-query as a virtual table for the execution of the query. A sub-query can be used as a table in a join statement, as a single value in a select statement, in the where clause of a SQL Server query, in the having clause of a SQL Server query, or incorporated in data manipulation statements.

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As a DBA you might not need to build connection strings for your servers very often, but developers certainly need to build these all the time and might contact you for help. Author Raj Vasant takes a look at the new capabilities of .NET 2.0, which can really help make this easier.

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Question of the Day

Identities and Sequences V

When thinking about the identity property and sequence objects, which of these can generate values before an insert statement is executed?

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