30How do you query semi-structured data (JSON) in SQL, and when should you flatten vs keep it nested?▼mediumSnowflakeDatabricksAmazon2 replies◆ premiumModern warehouses store JSON natively, and querying it well sets strong data engineers apart from the rest. The signal is path access plus unnesting, and a clear call on when to flatten hot fields versus keep the schema-on-read flexibility.Open full answer →
56How do you query deeply nested JSON with arrays in SQL, and when do you flatten vs keep it nested?▼mediumSnowflakeDatabricksGoogle1 replies◆ premiumPulling a scalar by path is easy; an array of objects three levels deep is where people freeze. The signal is LATERAL FLATTEN / UNNEST to explode arrays into rows plus a clear rule for when to flatten versus query in place.Open full answer →
