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SQL Server 2017 Developer???s Guide
book

SQL Server 2017 Developer???s Guide

by Dejan Sarka, Miloš Radivojević, William Durkin
March 2018
Intermediate to advanced content levelIntermediate to advanced
816 pages
19h 35m
English
Packt Publishing
Content preview from SQL Server 2017 Developer???s Guide

Data compression and query techniques

SQL Server supports data compression. Data compression reduces the size of the database, which helps improve query performance because queries on compressed data read fewer pages from the disk and thus use less IO. However, data compression requires extra CPU resources for updates, because data must be decompressed before and compressed after the update. Data compression is therefore suitable for data warehousing scenarios in which data is mostly read and only occasionally updated.

SQL Server supports three compression implementations:

  • Row compression: Row compression reduces metadata overhead by storing fixed data type columns in a variable-length format. This includes strings and numeric data. Row ...
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Publisher Resources

ISBN: 9781788476195Supplemental Content