© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2021
D. SarkaAdvanced Analytics with Transact-SQLhttps://doi.org/10.1007/978-1-4842-7173-5_4

4. Data Quality and Information

Dejan Sarka1  
(1)
Ljubjana, Slovenia
 

You start a shiny new analytical project. You do the initial overview of the data. And bang! You meet probably the biggest issue in advanced analysis and business intelligence: data quality. Garbage in, garbage out is a very old rule. Before doing advanced analyses, it is always recommended that you check the data quality. Measuring improvements in data quality over time can help to understand the factors that influence it.

Measuring data quality is tightly connected with or is nearly a synonym for data ...

Get Advanced Analytics with Transact-SQL: Exploring Hidden Patterns and Rules in Your Data now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.