For example, if you have multiple files that all follow the same schema, we strongly recommend uploading them as one table (for example, if you have a separate table for each year, or a separate table for each state, but the structure of each is the same). In the example of one file per state, this would allow researchers to query across all states, skipping the first step of doing up to 50 joins. Additionally, you generally shouldn't split out tables for performance reasons — even when querying billions of records, Redivis will execute in seconds.