A practical way to handle syncing from a sports API with your local database is to rely on stable unique identifiers from the API (such as match_id, team_id, venue_id) and map them directly to fields in your database so you can quickly check for existence before inserting or updating. If the API doesn’t guarantee consistent IDs, then create a matching layer using a combination of attributes (like team name + competition + date) and normalize the data to avoid duplicates caused by formatting differences. For your three scenarios, treat them as insert (new record), update (existing record with changed data), or ignore (no changes), and consider keeping a last_synced timestamp or version hash so you only process what’s actually new or modified instead of rechecking everything each time....