What is Compression - row-level and page-level compression?

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Data compression is a feature which is used to reduce disk storage space and increase the performance of the query by reducing the I/O operations.

SQL Server 2008 supports two types of compression - Row-level compression and Page-level compression.

A row-level and page-level compression takes place on the metadata.

Page level compression results in persisting certain common data that affects rows in a single location.

The compression takes place into number of bits. For example, the length of ‘varchar' will be stored in 3 bits.
Submitted by: Administrator

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