<invoke name="query_sql"> <parameter name="sql">SELECT column_name, null_count, ROUND(100.0 * null_count / 4500, 2) AS pct_missing FROM analytics.column_overview WHERE table_name = 'Social_media_impact_on_life' ORDER BY null_count DESC, column_name</parameter> <parameter name="purpose">Null count and percent missing per column</parameter> <parameter name="source">raw</parameter> </invoke> ```