Welche dieser Abfragen enthält nur Kaufdatensätze aus der zugrunde liegenden Tabelle?

 

Welche dieser Abfragen enthält nur Kaufdatensätze aus der zugrunde liegenden Tabelle?

 

• SELECT campaign, COUNT(DISTINCT user_id) AS purchasers, SUM(purchases) AS purchases FROM amazon_attributed_events_by_traffic_time WHERE purchases = 1 GROUP BY 1
• SELECT campaign, COUNT(DISTINCT user_id) AS purchasers, SUM(purchases) AS purchases FROM amazon_attributed_events_by_traffic_time GROUP BY 1
• SELECT campaign, COUNT(DISTINCT user_id) AS purchasers, SUM(purchases) AS purchases FROM conversions GROUP BY 1