What should be done to merge tables in a Parent-Child relationship for existing data streams?

To effectively merge tables in a Parent-Child relationship for existing data streams, recreating or reprocessing the Parent data streams is essential. This process ensures that the relationships between the data streams are correctly established and reflected in the data structure.

When you recreate or reprocess the Parent data stream, it allows for the integration of the Child data streams to align correctly with the updated Parent data. This step is crucial because it helps to ensure data integrity and that all relevant data points are appropriately associated within the relationship framework. By doing so, the merged tables will reflect accurate and comprehensive data insights based on the established relationships.

The other options highlight approaches that do not directly facilitate the proper merging of tables. For instance, contacting support may provide assistance but does not initiate the merging process. Changing the child data stream ID would disrupt the relationship rather than enhance it. Finally, suggesting that the merge is done automatically disregards the necessary steps to ensure data accuracy and proper relationships between the data streams.