   is_partitioning_column = 'YES' OR clustering_ordinal_position IS NOT NULL;
 
 
--- QUERY 5
+-- QUERY 4
 -- Question: If you wanted to query across multiple datasets, how could you do it?
 -- https://stackoverflow.com/questions/43457651/bigquery-select-tables-from-all-tables-within-project
--- Answer: With a UNION or a python script to iterate through each dataset in `bq ls`
+-- Answer: With a UNION (or a Python script) to iterate through each dataset in `bq ls`
+
+-- For example, which table has the most rows?
 
 WITH ALL__TABLES__ AS (
   SELECT * FROM `bigquery-public-data.baseball.__TABLES__` UNION ALL

ORDER BY row_count DESC -- Top 10 tables with the most rows
LIMIT 10;

-- Which table was it? 

 `bigquery-public-data.baseball.INFORMATION_SCHEMA.COLUMNS`;


-- QUERY 3
-- Are there any partitioned or clustered columns?
-- For some datasets, this query will return no results. For dataset that will return results, use wikipedia.

SELECT * FROM 
  -- Replace baseball with a different dataset:
