Webinar What every SQL Server DBA Needs to Know About Windows Server 2016
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Quality SQL Server Data
An Introduction to Data Quality Services
Topics of Discussion
• Introduction to SQL Data Quality and its Components
• Cleansing Data
• Identifying Matching (duplicate) Data
• Demonstration
Introduction to SQL Data Quality and its Components
The Need for a Data Quality Management Solution
What does the DQS Solution Provide?
What is a Knowledge Base ?
What is a Domain ?
What is Third Party Reference Data Service ?
What is a Matching Policy ?
The Need for a Data Quality Management Solution
• Business “Intelligence”• High quality data is critical
• Incorrect data can make its way into your data warehouse• Aggregating data from multiple sources can be problematic
• Inconsistent data
• Invalid data
• Duplicate entities
What does the DQS Solution Provide?
• Knowledge based solution for:• Data Cleansing – identifying invalid or inconsistent data values and correcting them.
• Data Matching – finding duplicate data entities
• DQS Components:• Data Quality Services Server
• Data Quality Client
• Data Cleansing SSIS Transformation
Knowledge Base Component
• Repository of knowledge about data:• Domains define values and rules for each field• Matching policies define rules for identifying duplicate records
What is a Domain?
• Domains are specific to a data field (column in a dataset)
• Domains can be individual or composite
• Domains contain the rules for the data• Valid • Invalid • Error
What is Third Party Reference Data Service ?
• The Reference Data Service feature in Data Quality Services (DQS) enables you to subscribe to third-party reference data providers
• Has the following benefits:• Comparing data guaranteed by a third-party company.• The reference data process is incorporated into DQS knowledge base building • Supports using reference data from Windows Azure Marketplace
What is a Matching Policy ?
• Define matching rules for business entities• Matching policies assess the likelihood of records being duplicates.• A matching policy can be added to a knowledge base containing rules that
help determine whether multiple data records represent the same business entity.
Demonstration
• Create a Knowledge base
• Use DQS to cleanse data
• Use DQS in an SSIS Package