Perform knowledge discovery in DQS

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The Data Quality knowledge base can be populated using interactive or computer-assisted processes. During the installation process of SQL Server 2016 Data Quality Services, you can choose to install the Data Quality Client to interactively create and maintain a DQS knowledge base. The DQS Client can be used to create data domains and add domain values manually or by importing them from an Excel spreadsheet or a data cleansing project.

In addition to interactively maintaining data through the DQS Client, you can maintain data by running a computer-assisted activity known as Knowledge Discovery. The Knowledge Discovery activity analyzes a sample of data that is used for data quality criteria. The algorithms built into DQS look for data inconsistencies and syntax errors and then propose changes to the data. You can then approve or reject the proposed changes or apply corrections manually.

To perform a Knowledge Discovery activity for the SuppliersName in the Suppliers Knowledge Base using an Excel data source, follow the steps below.

  • Open the Data Quality Services client and connect to the DQS instance
  • Click on Open Knowledge Base button from the Knowledge Base Management section
  • Select Suppliers from the Knowledge Base list
  • Click on Knowledge Discovery under the Select Activity list, then click Next
  • Select Excel File from the Data Source drop-down list
  • Browse and select the SuppliersDomain.xlsx file
  • Select SuppliersDomain.xlslx from the Worksheet drop-down list
  • Under the Mappings section, select SupplierName (String) from the Source Column drop-down list, then select SupplierName from the Domain drop-down list in the corresponding row
  • Click Next, then click the Start button
  • Click Finish, then click Publish

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