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Special Edition Using Microsoft® Visual Basic® .NET by Jeff Spotts, Brian Siler

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Introducing the Structured Query Language

Structured Query Language (SQL) is a specialized set of database programming commands that enable the developer or other database users to perform tasks in a database management system. Some examples of the types of tasks you can perform with SQL are

  • Retrieve data from one or more tables in one or more databases.

  • Change data in tables by inserting, deleting, and updating records.

  • Obtain summary information about the data in tables such as total and average values.

  • Create, modify, or delete database objects such as tables, indexes, and queries.

A SQL statement contains one or more lines of text, much like a code statement in Visual Basic. As you can see from the preceding list, SQL statements fall into two ...

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