CHAPTER 1

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Data Storage Internals

SQL Server database is a collection of objects that allow you to store and manipulate data. In theory, SQL Server supports 32,767 databases per instance, although the typical installation usually has only several databases. Obviously, the number of the databases SQL Server can handle depends on the load and hardware. It is not unusual to see servers hosting dozens or even hundreds of small databases.

In this chapter, we will discuss the internal structure of the databases, and will cover how SQL Server stores the data.

Database Files and Filegroups

Every database consists of one or more transaction log files and ...

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