How is SQL data stored?

Question

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). 14 мая 2009 г.

How does data get stored in SQL Server?

When you insert any data into a SQL Server database, it saves the data to a series of 8 KB pages inside the data file. If multiple data files exist within a filegroup, SQL Server allocates pages to all data files based on a round-robin mechanism.

How is SQL data stored in memory?

SQL Server stores its data in 8KB data pages. As these pages are read off disk they are stored in memory. This is referred to as buffer memory. A list of all the data pages in memory is stored in the dynamic management view sys.

How do I store SQL database files?

To specify that a column should store data on the file system, specify the FILESTREAM attribute on a varbinary(max) column. This causes the Database Engine to store all data for that column on the file system, but not in the database file. FILESTREAM data must be stored in FILESTREAM filegroups.

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