# Evolution reports Available in... * Big Data Platform * Cloud API Services Platform * Cloud Big Data Platform * Cloud Data Fabric * Cloud Data Management Platform * Data Fabric * Data Management Platform * Data Services Platform * Qlik Talend Cloud Enterprise Edition * Qlik Talend Cloud Premium Edition * Real-Time Big Data Platform An evolution report provides information showing the evolution through time of the indicators used on the analyses selected in a given report. This report allows you to compare current and historical statistics to determine the improvement or degradation of the analyzed data. ## An example of an evolution report Available in... * Big Data Platform * Cloud API Services Platform * Cloud Big Data Platform * Cloud Data Fabric * Cloud Data Management Platform * Data Fabric * Data Management Platform * Data Services Platform * Qlik Talend Cloud Enterprise Edition * Qlik Talend Cloud Premium Edition * Real-Time Big Data Platform ### Before you begin At least one type of analysis is created in the Profiling perspective. ### About this task In this example, you create a basic column analysis using simple statistics and generate an evolution report on this analysis. This evolution report provides us with the evolution of the simple statistics indicators through comparing current and historical statistics to determine the improvement or degradation of the data in the analyzed column. ### Procedure 1. Follow the steps outlined in [Creating a basic analysis on a database column](https://help.qlik.com/talend/en-US/studio-user-guide/8.0/creating-basic-analysis-on-database-column) to create a simple column analysis. In this analysis, you analyze one column using the Row Count, Blank Count and Distinct Count indicators. ![Configuration to apply the Row Count, the Blank Count, and the Distinct Count indicators.](https://help.qlik.com/talend/en-US/studio-user-guide/Resources/images/evolution_report3.png) 2. Right-click the analysis name in the DQ repository tree view and select New Report from the contextual menu. The report editor is displayed with the selected analysis. 3. From the Analyses menu, select Evolution as the type for the report you want to generate. 4. Select the Refresh All check box in the top-right corner to refresh the listed analysis before generating the report. 5. Click Next. You are in the Storage menu. 6. From the Datamart tab, set the connection parameters to the database where you want to store the report results. For further information about creating a report, see [Creating a report on specific analyses](https://help.qlik.com/talend/en-US/studio-user-guide/8.0/creating-report-on-specific-analyses). 7. From the Output file tab, personalize the presentation settings for the generated report. 8. Click Next. 9. From the Settings menu, define contexts if needed. 10. Click Save and run. The listed analysis is executed, the data is historized in the report database and a report document is generated in the selected format (PDF, HTML, XSL, or XML). Every time you generate this report, it will compare the current and historical statistics to determine the improvement or degradation of the data in the analyzed column. ![Example of a report with the current and historical statistics.](https://help.qlik.com/talend/en-US/studio-user-guide/Resources/images/Evolution_Report2.png) ### Results In every evolution report, you will have two graphics: the first indicates the change in the statistics and the second indicates the percentage of that change. The above report then tracks the evolution through time of the row count, distinct count and blank count of the data records in the column. Information noteImportant: If you import the items in an evolution report in another project in Talend Studio, the evolution chart will not display the data of the previous project. For further information on how to show the evolution of data through all projects, see *Migrating evolution reports* below. ## Migrating evolution reports Available in... * Big Data Platform * Cloud API Services Platform * Cloud Big Data Platform * Cloud Data Fabric * Cloud Data Management Platform * Data Fabric * Data Management Platform * Data Services Platform * Qlik Talend Cloud Enterprise Edition * Qlik Talend Cloud Premium Edition * Real-Time Big Data Platform Evolution reports show the evolution of data given some dimensions such as project name, analysis name, report name, etc. When one of these dimensions is different, Talend Studio can not find a direct link among the data. ### About this task When you import an evolution report from one project in Talend Studio to a different project that has a new name, this report will not show the history of the evolution of data in the old project. If the project name changes, no link is established between the old analysis results and the analysis results in the new project. So the report starts at a new point in the new project and shows any evolution of data from that point onwards in this new project. Two options are available for you to migrate evolution reports between projects and keep seeing the evolution of data through these different projects: * Import the evolution reports into a new project that has the same name of the old project. For further information about creating a local project when launching Talend Studio, see [Creating a project at initial Studio launch](https://help.qlik.com/talend/en-US/studio-user-guide/8.0/creating-project?ver=25#creating-a-project-at-initial-studio-launch_t). * Use a different name for this new local project but customize the JRXML template and use it to execute the evolution report.