How does SQL store records?

Question

A record, also known as a row, is the smallest storage structure in a SQL Server data file. Each row in a table is stored as an individual record on disk. Not only table data is stored as records, but also indexes, metadata, database boot structures and so forth. 9 окт. 2013 г.

How does SQL store data?

SQL Server data is stored in data files that, by default, have an . MDF extension. The log (. LDF) files are sequential files used by SQL Server to log transactions executed against the SQL Server instance (more on instances in a moment).

How does SQL Server use storage?

The most basic concept to understand concerning how SQL Server uses storage is that databases are composed of two types of files:Data files. These files store the database data. ... Log files. These files store the database transactions that allow a database to be restored back to a specific point in time.

Where does SQL save data?

SQL Server databases are stored in the file system in files. Files can be grouped into filegroups. For more information about files and filegroups, see Database Files and Filegroups. When people gain access to an instance of SQL Server they are identified as a login.

Where does SQL pull data from?

In SQL, to retrieve data stored in our tables, we use the SELECT statement. The result of this statement is always in the form of a table that we can view with our database client software or use with programming languages to build dynamic web pages or desktop applications.

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