Before working with tutorials, identify two data sources that you can use for practice. These data sources should not be live or mission-critical, and they should be similar in schema and data.
Data comparison jobs automate the process of comparing and correcting data between data sources at the database, table, and row level. You select a source and a target data source from Data Source Explorer, map databases and tables between the two selections, and then run the comparison job.
DB Change Manager compares the information and returns a results screen with details including:
- An overall percentage of the data that is the same between the source and target
- Discrepancies between the two databases, such as data values that exist on only one
Once a data comparison job has run, you can then correct any synchronization issues by running an automatically-generated SQL script that adds missing rows and updates out-of-sync values. You can modify the SQL script prior to running it, and store it for future use.
To start Change Manager
- Start Change Manager using the Start menu’s IDERA DB Change Manager [version] item.
When DB Change Manager first starts, it displays a Welcome screen. Review the Welcome screen options, and then close it.
Adding data sources
In order to define and run jobs, you first register data sources by providing connection information and other details to DB Change Manager. Once a data source has been registered, it remains stored in a catalog and does not need to be reregistered each time you open DB Change Manager. You can use a single registered data source in multiple jobs.
Data Source Explorer shows the registered data sources and their associated jobs, if any. Before registering a data source, gather the information about the repository location and connectivity permissions.
To add a data source
- Click the Discover Data Sources icon at the top of the Data Source Explorer view.
- In the Discover Data Sources wizard, select the locations to search for data sources, and then click Next.
Select the data sources you want to add to the DB Change Manager environment, and then click Finish.
The new data source or sources appear in the Data Source Explorer.An alternative to using the Discover Data Sources wizard is to click File > New Data Source and set its connection properties.
- In the Data Source Explorer, right-click on a data source and select Properties to work with connection properties for the datasource.
