<invoke name="query_sql"> <parameter name="sql">SELECT COUNT(*) AS row_count, COUNT(DISTINCT Student_ID) AS distinct_students, MIN(_ingestion_timestamp) AS first_ingested, MAX(_ingestion_timestamp) AS last_ingested, COUNT(DISTINCT _batch_id) AS batches FROM raw.Social_media_impact_on_life</parameter> <parameter name="purpose">Confirm row count and check the only true timestamp column's range</parameter> <parameter name="source">raw</parameter> </invoke>